1 files changed, 1 insertions, 0 deletions

diff --git a/cgit.h b/cgit.h
index 4090cd4..8f84281 100644
--- a/cgit.h
+++ b/cgit.h
@@ -290,12 +290,13 @@ extern int cgit_diff_files(const unsigned char *old_sha1,
 extern void cgit_diff_tree(const unsigned char *old_sha1,
                            const unsigned char *new_sha1,
                            filepair_fn fn, const char *prefix, int ignorews);
 
 extern void cgit_diff_commit(struct commit *commit, filepair_fn fn);
 
+__attribute__((format (printf,1,2)))
 extern char *fmt(const char *format,...);
 
 extern struct commitinfo *cgit_parse_commit(struct commit *commit);
 extern struct taginfo *cgit_parse_tag(struct tag *tag);
 extern void cgit_parse_url(const char *url);