diff --git a/include/_tail_cc/signal.h b/include/_tail_cc/signal.h
index 38d159c05..d5bf433c6 100644
--- a/include/_tail_cc/signal.h
+++ b/include/_tail_cc/signal.h
@@ -51,10 +51,10 @@
 #endif
 
 
-#define SIG_DFL		((int (*)())0)		/* default signal handling */
-#define SIG_IGN		((int (*)())1)		/* ignore signal */
-#define SIG_ERR		((int (*)())-1)
+#define SIG_DFL		((void (*)())0)		/* default signal handling */
+#define SIG_IGN		((void (*)())1)		/* ignore signal */
+#define SIG_ERR		((void (*)())-1)
 
-int (*signal()) ();
+void (*signal()) ();
 
 #endif /* _SIGNAL_H */
diff --git a/include/_tail_mon/signal.h b/include/_tail_mon/signal.h
index f74a88767..b693e9a85 100644
--- a/include/_tail_mon/signal.h
+++ b/include/_tail_mon/signal.h
@@ -21,6 +21,6 @@
 #define	SIGALRM	14	/* alarm clock */
 #define	SIGTERM	15	/* software termination signal from kill */
 
-int	(*signal())();
-#define	SIG_DFL	(int (*)())-2
-#define	SIG_IGN	(int (*)())-3
+void	(*signal())();
+#define	SIG_DFL	(void (*)())-2
+#define	SIG_IGN	(void (*)())-3