diff --git a/arch/z16/include/z16f/irq.h b/arch/z16/include/z16f/irq.h
index 8b718cf748..eaca0fbacd 100644
--- a/arch/z16/include/z16f/irq.h
+++ b/arch/z16/include/z16f/irq.h
@@ -124,8 +124,8 @@ extern "C" {
 #define EXTERN extern
 #endif
 
-EXTERN irqstate_t irqsave(void;
-EXTERN void       irqrestore(irqstate_t flags;
+EXTERN irqstate_t irqsave(void);
+EXTERN void       irqrestore(irqstate_t flags);
 
 #undef EXTERN
 #ifdef __cplusplus