diff --git a/src/signal.c b/src/signal.c
index 128a3838f..e1f5a8373 100644
--- a/src/signal.c
+++ b/src/signal.c
@@ -144,7 +144,7 @@ struct sig_handler *signal_register_fct(int sig, void (*fct)(struct sig_handler
 		return NULL;
 
 	if (sig)
-		signal(sig, signal_handler);
+		signal(sig, fct ? signal_handler : SIG_IGN);
 
 	if (!fct)
 		return NULL;