diff --git a/sources/xxtea/xxtea.h b/sources/xxtea/xxtea.h
index 1f4063a0..117d81ec 100644
--- a/sources/xxtea/xxtea.h
+++ b/sources/xxtea/xxtea.h
@@ -21,16 +21,12 @@
 
 #include <stddef.h> /* for size_t & NULL declarations */
 
-#if CC_TARGET_PLATFORM == CC_PLATFORM_WIN32
-#if defined(CC_STATIC)
-#define XXTEA_DLL
-#else
+#if defined(_WIN32) && defined(_WINDOWS)
 #if defined(_USRDLL)
 #define XXTEA_DLL     __declspec(dllexport)
 #else         /* use a DLL library */
 #define XXTEA_DLL     __declspec(dllimport)
 #endif
-#endif
 #else
 #define XXTEA_DLL
 #endif