diff --git a/src/misc1.c b/src/misc1.c
index bd1fe25..5a34513 100644
--- a/src/misc1.c
+++ b/src/misc1.c
@@ -11049,7 +11049,7 @@
 	return NULL;
 
     /* get a name for the temp file */
-    if ((tempname = vim_tempname('o')) == NULL)
+    if ((tempname = vim_tempname('o', FALSE)) == NULL)
     {
 	EMSG(_(e_notmp));
 	return NULL;