diff --git a/src/os_mswin.c b/src/os_mswin.c
index 0b9dfd9..8be2d40 100644
--- a/src/os_mswin.c
+++ b/src/os_mswin.c
@@ -593,7 +593,7 @@
 				     gui.starting ? (char_u *)_("Message") :
 #endif
 					     (char_u *)_("Error"),
-				     p, (char_u *)_("&Ok"), 1, NULL);
+				     p, (char_u *)_("&Ok"), 1, NULL, FALSE);
 		break;
 	    }
 	ga_clear(&error_ga);