diff --git a/desmume/src/types.h b/desmume/src/types.h
index 8fe62b89d..a65d339e9 100644
--- a/desmume/src/types.h
+++ b/desmume/src/types.h
@@ -91,7 +91,7 @@
 
 #if defined(_MSC_VER) || defined(__INTEL_COMPILER)
 #define ALIGN(X) __declspec(align(X))
-#elif __GNUC__
+#elif defined(__GNUC__)
 #define ALIGN(X) __attribute__ ((aligned (X)))
 #else
 #define ALIGN(X)