diff --git a/arch/sh/atomic_arch.h b/arch/sh/atomic_arch.h
index 74444d5d..d48a7651 100644
--- a/arch/sh/atomic_arch.h
+++ b/arch/sh/atomic_arch.h
@@ -21,7 +21,7 @@ static inline int a_sc(volatile int *p, int v)
 #define a_barrier a_barrier
 static inline void a_barrier()
 {
-	__asm__ __volatile__ ("synco" : : "memory");
+	__asm__ __volatile__ ("synco" ::: "memory");
 }
 
 #define a_pre_llsc a_barrier