diff --git a/cde/programs/dtimsstart/file.c b/cde/programs/dtimsstart/file.c
index 7dd68b321..cd19ba8d7 100644
--- a/cde/programs/dtimsstart/file.c
+++ b/cde/programs/dtimsstart/file.c
@@ -979,7 +979,7 @@ int	set_select_mode(int cur_mode, int new_mode)
 	char	*lp, *valp;
 	int	n, line_num, mode_line;
 
-	sprintf(new_fname, "%s,tmp", path);
+	snprintf(new_fname, sizeof(new_fname), "%s,tmp", path);
 	if (!(new_fp = fopen(new_fname, "w"))) {
 	    fclose(fp);
 	    DPR(("set_select_mode(): cannot create %s\n", new_fname));