diff --git a/dwm.c b/dwm.c
index f1d86b2..67c6b2b 100644
--- a/dwm.c
+++ b/dwm.c
@@ -1851,7 +1851,7 @@ updatebarpos(Monitor *m)
 }
 
 void
-updateclientlist()
+updateclientlist(void)
 {
 	Client *c;
 	Monitor *m;