diff --git a/lang/cem/libcc.ansi/headers/setjmp.h b/lang/cem/libcc.ansi/headers/setjmp.h
index b15673d86..0a81525ae 100644
--- a/lang/cem/libcc.ansi/headers/setjmp.h
+++ b/lang/cem/libcc.ansi/headers/setjmp.h
@@ -20,7 +20,7 @@
 typedef struct {
 	long __mask;
 	int __flag;
-	void (*__pc)();
+	void (*__pc)(void);
 	void *__sp;
 	void *__lb;
 } jmp_buf[1];