diff --git a/signal.c b/signal.c
index a57943e8..54c2d6d6 100644
--- a/signal.c
+++ b/signal.c
@@ -80,7 +80,7 @@ static void evsignal_cb(int fd, short what, void *arg)
 
 	n = read(fd, signals, sizeof(signals));
 	if (n == -1)
-		err(1, "%s: read");
+		err(1, "%s: read", __func__);
 	event_add(ev, NULL);
 }