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Diffstat (limited to 'source/ui-shared.c')
-rw-r--r--source/ui-shared.c2
1 file changed, 1 insertion, 1 deletion
diff --git a/source/ui-shared.c b/source/ui-shared.c
index 88e5075..4084748 100644
--- a/source/ui-shared.c
+++ b/source/ui-shared.c
@@ -1237,7 +1237,7 @@ void cgit_compose_snapshot_prefix(struct strbuf *filename, const char *base,
* i.e. each stripped tag can be inverted without ambiguities.
*/
if (repo_get_oid(the_repository, fmt("refs/tags/%s", ref), &oid) == 0 &&
- (ref[0] == 'v' || ref[0] == 'V') && isdigit(ref[1]) &&
+ (ref[0] == 'v' || ref[0] == 'V') && isdigit((unsigned char)ref[1]) &&
((repo_get_oid(the_repository, fmt("refs/tags/%s", ref + 1), &oid) == 0) +
(repo_get_oid(the_repository, fmt("refs/tags/v%s", ref + 1), &oid) == 0) +
(repo_get_oid(the_repository, fmt("refs/tags/V%s", ref + 1), &oid) == 0) == 1))