1 files changed, 2 insertions, 1 deletions
diff --git a/ulog.h b/ulog.h
index 4818b1a..46d3c77 100644
--- a/ulog.h
+++ b/ulog.h
@@ -32,7 +32,8 @@ void ulog_close(void);
 
 void ulog_threshold(int threshold);
 
-void ulog(int priority, const char *fmt, ...);
+void ulog(int priority, const char *fmt, ...)
+	__attribute__ ((format (printf, 2, 3)));
 
 #define ULOG_INFO(fmt, ...) ulog(LOG_INFO, fmt, ## __VA_ARGS__)
 #define ULOG_NOTE(fmt, ...) ulog(LOG_NOTICE, fmt, ## __VA_ARGS__)