diff --git a/H/inline-only.h b/H/inline-only.h
index 5e5c77847..6d58b3991 100644
--- a/H/inline-only.h
+++ b/H/inline-only.h
@@ -1,10 +1,14 @@
 #ifndef _YAP_INLINE_ONLY_H_
 #define _YAP_INLINE_ONLY_H_
 
-#ifdef __GNUC__
+#ifdef __clang__
 #define INLINE_ONLY __attribute__((gnu_inline,always_inline))
 #else
+#ifdef __GNUC__
+#define INLINE_ONLY __attribute__((always_inline))
+#else
 #define INLINE_ONLY
 #endif
+#endif
 
 #endif