diff --git a/src/C4Attributes.h b/src/C4Attributes.h
index b869ca9f2..75c99082e 100644
--- a/src/C4Attributes.h
+++ b/src/C4Attributes.h
@@ -16,5 +16,7 @@
 #pragma once
 
 #if __has_cpp_attribute(msvc::no_unique_address)
-#define no_unique_address msvc::no_unique_address
+#define NO_UNIQUE_ADDRESS msvc::no_unique_address
+#else
+#define NO_UNIQUE_ADDRESS no_unique_address
 #endif
diff --git a/src/C4Coroutine.h b/src/C4Coroutine.h
index 2597670f1..eef3fe8b7 100644
--- a/src/C4Coroutine.h
+++ b/src/C4Coroutine.h
@@ -56,7 +56,7 @@ class CancelledException : public std::exception
 template<typename U>
 struct ValueWrapper
 {
-	[[no_unique_address]] U Value;
+	[[NO_UNIQUE_ADDRESS]] U Value;
 	U &&GetValue() { return static_cast<U &&>(Value); }
 };
 
diff --git a/src/C4CurlSystem.h b/src/C4CurlSystem.h
index d8cd6266f..10507df05 100644
--- a/src/C4CurlSystem.h
+++ b/src/C4CurlSystem.h
@@ -200,7 +200,7 @@ class C4CurlSystem
 
 private:
 	std::atomic_uint32_t timeout{StdSync::Infinite};
-	[[no_unique_address]] GlobalInit globalInit;
+	[[NO_UNIQUE_ADDRESS]] GlobalInit globalInit;
 
 	MultiHandle multiHandle;