1 files changed, 2 insertions, 1 deletions
diff --git a/lib/libalpm/alpm.h b/lib/libalpm/alpm.h
index 729a4c81..14443bb7 100644
--- a/lib/libalpm/alpm.h
+++ b/lib/libalpm/alpm.h
@@ -271,8 +271,9 @@ typedef enum _alpm_loglevel_t {
 } alpm_loglevel_t;
 
 typedef void (*alpm_cb_log)(alpm_loglevel_t, const char *, va_list);
+
 int alpm_logaction(alpm_handle_t *handle, const char *prefix,
-		const char *fmt, ...);
+		const char *fmt, ...) __attribute__((format(printf, 3, 4)));
 
 /**
  * Events.