1 files changed, 2 insertions, 1 deletions
diff --git a/trace.c b/trace.c
index 5ec0e3bd16..08180a90bc 100644
--- a/trace.c
+++ b/trace.c
@@ -75,7 +75,8 @@ static void trace_vprintf(const char *key, const char *fmt, va_list ap)
 	strbuf_release(&buf);
 }
 
-static void trace_printf_key(const char *key, const char *fmt, ...)
+__attribute__((format (printf, 2, 3)))
+void trace_printf_key(const char *key, const char *fmt, ...)
 {
 	va_list ap;
 	va_start(ap, fmt);