diff --git a/src/memline.c b/src/memline.c
index d62697d..730496c 100644
--- a/src/memline.c
+++ b/src/memline.c
@@ -757,7 +757,7 @@
     /* For a spell buffer use a temp file name. */
     if (buf->b_spell)
     {
-	fname = vim_tempname('s');
+	fname = vim_tempname('s', FALSE);
 	if (fname != NULL)
 	    (void)mf_open_file(mfp, fname);	/* consumes fname! */
 	buf->b_may_swap = FALSE;