diff --git a/src/popupwin.c b/src/popupwin.c
index e353272..9d60aa2 100644
--- a/src/popupwin.c
+++ b/src/popupwin.c
@@ -699,8 +699,8 @@
 
 	    if (syn_name2id((char_u *)linehl) == 0)
 		linehl = "PmenuSel";
-	    sign_define_by_name(sign_name, NULL, (char_u *)linehl,
-						       NULL, NULL, NULL, NULL);
+	    sign_define_by_name(sign_name, NULL, (char_u *)linehl, NULL, NULL, NULL,
+		    NULL, SIGN_DEF_PRIO);
 	}
 
 	sign_place(&sign_id, (char_u *)"PopUpMenu", sign_name,