Index: src/atomic.h
==================================================================
--- src/atomic.h
+++ src/atomic.h
@@ -970,11 +970,11 @@
 static OF_INLINE void
 of_memory_barrier(void)
 {
 #if !defined(OF_HAVE_THREADS)
 	/* nop */
-#elif defined(OF_X86_64_ASM) || defined(OF_X86_ASM)
+#elif defined(OF_X86_64_ASM)
 	__asm__ __volatile__ (
 	    "mfence" ::: "memory"
 	);
 #elif defined(OF_POWERPC_ASM)
 	__asm__ __volatile__ (