diff --git a/skratch.c b/skratch.c
index 751ff84..92f1a21 100644
--- a/skratch.c
+++ b/skratch.c
@@ -35,10 +35,13 @@ int make_skratch_file(struct Flags *f)
 {
 	char fp[4096];
 	int fd = 0;
-	snprintf(fp, sizeof(fp), "%s/%s", f->skratch_path, f->filename);
+	if (!f->use_s) f->suffix = "";
+
+	snprintf(fp, sizeof(fp), "%s/%s%s", f->skratch_path, f->filename, f->suffix);
 	if (!strcmp(f->filename, "skratch-XXXXXX"))
 	{
-		fd = mkstemp(fp);
+		int s_len = strlen(f->suffix);
+		fd = mkstemps(fp, s_len);
 		close(fd);
 	}
 	if (fd == -1)