diff --git a/docs/juce-module.md b/docs/juce-module.md
index eb5e675..9c83f29 100644
--- a/docs/juce-module.md
+++ b/docs/juce-module.md
@@ -56,6 +56,13 @@ module needs from it only exists from JUCE 8.0.4. The module detects it: link it
 and the transitions run on `juce::Animator`, leave it out and they run on the
 module's own equivalent. Nothing to configure either way.
 
+The header is safe to include from a translation unit with a file-scope
+`using namespace juce;`, in either include order. Getting there costs one thing
+worth knowing about: it renames the two system-header names that would otherwise
+be ambiguous with JUCE's, Carbon's `Point` and GDI's `Rectangle()`, so neither is
+reachable under its own name once you include the module header. Define
+`MOONBASE_DISABLE_SYSTEM_NAME_SHIM` if you need them.
+
 ## Configure + show it
 
 ```cpp
diff --git a/include/moonbase/detail/crypto/apple_backend.hpp b/include/moonbase/detail/crypto/apple_backend.hpp
index 53809fc..c7ed046 100644
--- a/include/moonbase/detail/crypto/apple_backend.hpp
+++ b/include/moonbase/detail/crypto/apple_backend.hpp
@@ -11,9 +11,27 @@
 #include <string_view>
 #include <vector>
 
+// MacTypes.h's global `Point` is ambiguous with juce::Point in a TU with a
+// file-scope `using namespace juce;`, and MacTypes.h itself then stops parsing.
+#ifndef MOONBASE_DISABLE_SYSTEM_NAME_SHIM
+#pragma push_macro("Point")
+#pragma push_macro("Component")
+#undef Point
+#undef Component
+#define Point MoonbaseCarbonDummyPointName
+#define Component MoonbaseCarbonDummyCompName
+#endif
+
 #include <CommonCrypto/CommonDigest.h>
 #include <Security/Security.h>
 
+#ifndef MOONBASE_DISABLE_SYSTEM_NAME_SHIM
+#undef Point
+#undef Component
+#pragma pop_macro("Component")
+#pragma pop_macro("Point")
+#endif
+
 #include "moonbase/detail/crypto/der.hpp"
 #include "moonbase/errors.hpp"
 
diff --git a/include/moonbase/detail/crypto/windows_backend.hpp b/include/moonbase/detail/crypto/windows_backend.hpp
index af4b57e..e7238a2 100644
--- a/include/moonbase/detail/crypto/windows_backend.hpp
+++ b/include/moonbase/detail/crypto/windows_backend.hpp
@@ -18,10 +18,23 @@
 #ifndef WIN32_LEAN_AND_MEAN
 #define WIN32_LEAN_AND_MEAN
 #endif
+// wingdi.h's global `Rectangle()` is ambiguous with juce::Rectangle in a TU with
+// a file-scope `using namespace juce;`.
+#ifndef MOONBASE_DISABLE_SYSTEM_NAME_SHIM
+#pragma push_macro("Rectangle")
+#undef Rectangle
+#define Rectangle MoonbaseGdiDummyRectangleName
+#endif
+
 #include <windows.h>
 
 #include <bcrypt.h>
 
+#ifndef MOONBASE_DISABLE_SYSTEM_NAME_SHIM
+#undef Rectangle
+#pragma pop_macro("Rectangle")
+#endif
+
 #include "moonbase/detail/crypto/der.hpp"
 #include "moonbase/errors.hpp"
 
diff --git a/include/moonbase/legacy_fingerprint.hpp b/include/moonbase/legacy_fingerprint.hpp
index e00ca0a..ad920a7 100644
--- a/include/moonbase/legacy_fingerprint.hpp
+++ b/include/moonbase/legacy_fingerprint.hpp
@@ -21,7 +21,19 @@
 #ifndef NOMINMAX
 #define NOMINMAX
 #endif
+// wingdi.h's global `Rectangle()`, see detail/crypto/windows_backend.hpp.
+#ifndef MOONBASE_DISABLE_SYSTEM_NAME_SHIM
+#pragma push_macro("Rectangle")
+#undef Rectangle
+#define Rectangle MoonbaseGdiDummyRectangleName
+#endif
+
 #include <windows.h>
+
+#ifndef MOONBASE_DISABLE_SYSTEM_NAME_SHIM
+#undef Rectangle
+#pragma pop_macro("Rectangle")
+#endif
 #else
 #include <unistd.h>
 #endif
diff --git a/include/moonbase/moonbase_device_id_resolver.hpp b/include/moonbase/moonbase_device_id_resolver.hpp
index 3e97495..a9af1db 100644
--- a/include/moonbase/moonbase_device_id_resolver.hpp
+++ b/include/moonbase/moonbase_device_id_resolver.hpp
@@ -34,7 +34,19 @@
 #ifndef NOMINMAX
 #define NOMINMAX
 #endif
+// wingdi.h's global `Rectangle()`, see detail/crypto/windows_backend.hpp.
+#ifndef MOONBASE_DISABLE_SYSTEM_NAME_SHIM
+#pragma push_macro("Rectangle")
+#undef Rectangle
+#define Rectangle MoonbaseGdiDummyRectangleName
+#endif
+
 #include <windows.h>
+
+#ifndef MOONBASE_DISABLE_SYSTEM_NAME_SHIM
+#undef Rectangle
+#pragma pop_macro("Rectangle")
+#endif
 #else
 #include <unistd.h>
 #endif
@@ -68,9 +80,26 @@
      || (defined(TARGET_OS_MACCATALYST) && TARGET_OS_MACCATALYST)) \
     && !defined(MOONBASE_FINGERPRINT_NO_IOKIT)
 #define MOONBASE_FINGERPRINT_USE_IOKIT 1
+// MacTypes.h's global `Point`, see detail/crypto/apple_backend.hpp.
+#ifndef MOONBASE_DISABLE_SYSTEM_NAME_SHIM
+#pragma push_macro("Point")
+#pragma push_macro("Component")
+#undef Point
+#undef Component
+#define Point MoonbaseCarbonDummyPointName
+#define Component MoonbaseCarbonDummyCompName
+#endif
+
 #include <CoreFoundation/CoreFoundation.h>
 #include <IOKit/IOKitLib.h>
 #include <IOKit/IOKitKeys.h>
+
+#ifndef MOONBASE_DISABLE_SYSTEM_NAME_SHIM
+#undef Point
+#undef Component
+#pragma pop_macro("Component")
+#pragma pop_macro("Point")
+#endif
 #endif
 #endif
 
diff --git a/modules/moonbase_licensing/README.md b/modules/moonbase_licensing/README.md
index bbcaf83..45a070a 100644
--- a/modules/moonbase_licensing/README.md
+++ b/modules/moonbase_licensing/README.md
@@ -88,6 +88,11 @@ needs from it only exists from JUCE 8.0.4. The module detects it: link it and th
 transitions run on `juce::Animator`, leave it out and they run on the module's own
 equivalent, with the same curves.
 
+The header is safe to include from a translation unit with a file-scope
+`using namespace juce;`, in either include order. See
+[the JUCE module guide](../../docs/juce-module.md) for the one caveat that comes with
+that.
+
 ## Configure and use
 
 Only three fields are required; in a plugin the product and manufacturer names default
diff --git a/modules/moonbase_licensing/moonbase/detail/crypto/apple_backend.hpp b/modules/moonbase_licensing/moonbase/detail/crypto/apple_backend.hpp
index 53809fc..c7ed046 100644
--- a/modules/moonbase_licensing/moonbase/detail/crypto/apple_backend.hpp
+++ b/modules/moonbase_licensing/moonbase/detail/crypto/apple_backend.hpp
@@ -11,9 +11,27 @@
 #include <string_view>
 #include <vector>
 
+// MacTypes.h's global `Point` is ambiguous with juce::Point in a TU with a
+// file-scope `using namespace juce;`, and MacTypes.h itself then stops parsing.
+#ifndef MOONBASE_DISABLE_SYSTEM_NAME_SHIM
+#pragma push_macro("Point")
+#pragma push_macro("Component")
+#undef Point
+#undef Component
+#define Point MoonbaseCarbonDummyPointName
+#define Component MoonbaseCarbonDummyCompName
+#endif
+
 #include <CommonCrypto/CommonDigest.h>
 #include <Security/Security.h>
 
+#ifndef MOONBASE_DISABLE_SYSTEM_NAME_SHIM
+#undef Point
+#undef Component
+#pragma pop_macro("Component")
+#pragma pop_macro("Point")
+#endif
+
 #include "moonbase/detail/crypto/der.hpp"
 #include "moonbase/errors.hpp"
 
diff --git a/modules/moonbase_licensing/moonbase/detail/crypto/windows_backend.hpp b/modules/moonbase_licensing/moonbase/detail/crypto/windows_backend.hpp
index af4b57e..e7238a2 100644
--- a/modules/moonbase_licensing/moonbase/detail/crypto/windows_backend.hpp
+++ b/modules/moonbase_licensing/moonbase/detail/crypto/windows_backend.hpp
@@ -18,10 +18,23 @@
 #ifndef WIN32_LEAN_AND_MEAN
 #define WIN32_LEAN_AND_MEAN
 #endif
+// wingdi.h's global `Rectangle()` is ambiguous with juce::Rectangle in a TU with
+// a file-scope `using namespace juce;`.
+#ifndef MOONBASE_DISABLE_SYSTEM_NAME_SHIM
+#pragma push_macro("Rectangle")
+#undef Rectangle
+#define Rectangle MoonbaseGdiDummyRectangleName
+#endif
+
 #include <windows.h>
 
 #include <bcrypt.h>
 
+#ifndef MOONBASE_DISABLE_SYSTEM_NAME_SHIM
+#undef Rectangle
+#pragma pop_macro("Rectangle")
+#endif
+
 #include "moonbase/detail/crypto/der.hpp"
 #include "moonbase/errors.hpp"
 
diff --git a/modules/moonbase_licensing/moonbase/legacy_fingerprint.hpp b/modules/moonbase_licensing/moonbase/legacy_fingerprint.hpp
index e00ca0a..ad920a7 100644
--- a/modules/moonbase_licensing/moonbase/legacy_fingerprint.hpp
+++ b/modules/moonbase_licensing/moonbase/legacy_fingerprint.hpp
@@ -21,7 +21,19 @@
 #ifndef NOMINMAX
 #define NOMINMAX
 #endif
+// wingdi.h's global `Rectangle()`, see detail/crypto/windows_backend.hpp.
+#ifndef MOONBASE_DISABLE_SYSTEM_NAME_SHIM
+#pragma push_macro("Rectangle")
+#undef Rectangle
+#define Rectangle MoonbaseGdiDummyRectangleName
+#endif
+
 #include <windows.h>
+
+#ifndef MOONBASE_DISABLE_SYSTEM_NAME_SHIM
+#undef Rectangle
+#pragma pop_macro("Rectangle")
+#endif
 #else
 #include <unistd.h>
 #endif
diff --git a/modules/moonbase_licensing/moonbase/moonbase_device_id_resolver.hpp b/modules/moonbase_licensing/moonbase/moonbase_device_id_resolver.hpp
index 3e97495..a9af1db 100644
--- a/modules/moonbase_licensing/moonbase/moonbase_device_id_resolver.hpp
+++ b/modules/moonbase_licensing/moonbase/moonbase_device_id_resolver.hpp
@@ -34,7 +34,19 @@
 #ifndef NOMINMAX
 #define NOMINMAX
 #endif
+// wingdi.h's global `Rectangle()`, see detail/crypto/windows_backend.hpp.
+#ifndef MOONBASE_DISABLE_SYSTEM_NAME_SHIM
+#pragma push_macro("Rectangle")
+#undef Rectangle
+#define Rectangle MoonbaseGdiDummyRectangleName
+#endif
+
 #include <windows.h>
+
+#ifndef MOONBASE_DISABLE_SYSTEM_NAME_SHIM
+#undef Rectangle
+#pragma pop_macro("Rectangle")
+#endif
 #else
 #include <unistd.h>
 #endif
@@ -68,9 +80,26 @@
      || (defined(TARGET_OS_MACCATALYST) && TARGET_OS_MACCATALYST)) \
     && !defined(MOONBASE_FINGERPRINT_NO_IOKIT)
 #define MOONBASE_FINGERPRINT_USE_IOKIT 1
+// MacTypes.h's global `Point`, see detail/crypto/apple_backend.hpp.
+#ifndef MOONBASE_DISABLE_SYSTEM_NAME_SHIM
+#pragma push_macro("Point")
+#pragma push_macro("Component")
+#undef Point
+#undef Component
+#define Point MoonbaseCarbonDummyPointName
+#define Component MoonbaseCarbonDummyCompName
+#endif
+
 #include <CoreFoundation/CoreFoundation.h>
 #include <IOKit/IOKitLib.h>
 #include <IOKit/IOKitKeys.h>
+
+#ifndef MOONBASE_DISABLE_SYSTEM_NAME_SHIM
+#undef Point
+#undef Component
+#pragma pop_macro("Component")
+#pragma pop_macro("Point")
+#endif
 #endif
 #endif
 
diff --git a/tests/juce/CMakeLists.txt b/tests/juce/CMakeLists.txt
index 58991a8..2c97813 100644
--- a/tests/juce/CMakeLists.txt
+++ b/tests/juce/CMakeLists.txt
@@ -22,7 +22,10 @@ endif()
 juce_add_console_app(MoonbaseJuceTests
     PRODUCT_NAME "Moonbase JUCE Tests")
 
-target_sources(MoonbaseJuceTests PRIVATE controller_tests.cpp)
+target_sources(MoonbaseJuceTests PRIVATE
+    controller_tests.cpp
+    # Compile-only guard, see the file header.
+    global_using_namespace_juce.cpp)
 
 target_compile_features(MoonbaseJuceTests PRIVATE cxx_std_17)
 
diff --git a/tests/juce/global_using_namespace_juce.cpp b/tests/juce/global_using_namespace_juce.cpp
new file mode 100644
index 0000000..1b6628b
--- /dev/null
+++ b/tests/juce/global_using_namespace_juce.cpp
@@ -0,0 +1,41 @@
+// The module header must be includable from a TU with a file-scope
+// `using namespace juce;`, the way HISE is written. No other TU in this repo has
+// one, so without this the system-header name collisions (MacTypes.h's `Point`,
+// wingdi.h's `Rectangle()`) are invisible to CI. The compile is the assertion.
+
+#include <juce_gui_basics/juce_gui_basics.h>
+
+using namespace juce;
+
+#include <moonbase_licensing/moonbase_licensing.h>
+
+#include <doctest/doctest.h>
+
+namespace
+{
+// Unqualified on purpose: anything the system headers leak shows up here.
+Point<float> makePoint() { return { 3.0f, 4.0f }; }
+Rectangle<int> makeRectangle() { return { 0, 0, 640, 480 }; }
+
+[[maybe_unused]] Component* component = nullptr;
+[[maybe_unused]] Timer* timer = nullptr;
+} // namespace
+
+TEST_CASE("the module header survives a global using namespace juce")
+{
+    CHECK(makePoint().getDistanceFromOrigin() == doctest::Approx(5.0f));
+    CHECK(makeRectangle().getWidth() == 640);
+
+    String text { "moonbase" };
+    MemoryBlock block { text.toRawUTF8(), text.getNumBytesAsUTF8() };
+    CHECK(block.getSize() == 8);
+
+    Range<int> range { 2, 7 };
+    CHECK(range.getLength() == 5);
+
+    Colour colour = Colours::white;
+    CHECK(colour.isOpaque());
+
+    moonbase::juce_integration::ActivationConfig config;
+    CHECK(config.resolvedDeviceIdResolver() != nullptr);
+}