diff --git a/include/common.h b/include/common.h
index 491bc98..f3353c8 100644
--- a/include/common.h
+++ b/include/common.h
@@ -116,8 +116,14 @@
 void	enable_interrupts  (void);
 int	disable_interrupts (void);
 #else
-#define enable_interrupts() do {} while (0)
-#define disable_interrupts() 0
+static inline void enable_interrupts(void)
+{
+}
+
+static inline int disable_interrupts(void)
+{
+	return 0;
+}
 #endif
 
 /* lib_$(ARCH)/time.c */