diff --git a/include/rthw.h b/include/rthw.h
index 1c663ced67..2d5bbd09e2 100644
--- a/include/rthw.h
+++ b/include/rthw.h
@@ -235,9 +235,9 @@ void rt_hw_secondary_cpu_idle_exec(void);
 #endif
 
 #ifndef RT_USING_CACHE
-#define rt_hw_isb(void)
-#define rt_hw_dmb(void)
-#define rt_hw_dsb(void)
+#define rt_hw_isb()
+#define rt_hw_dmb()
+#define rt_hw_dsb()
 #endif
 
 #ifdef __cplusplus