diff --git a/ffserver.c b/ffserver.c
index bbe65b438d02c9f124c87fe9e5c6a20ed75b3f16..ab4fba61435e5dcc20d9d60a665999bb416870b2 100644
--- a/ffserver.c
+++ b/ffserver.c
@@ -344,7 +344,7 @@ static void http_vlog(const char *fmt, va_list vargs)
     }
 }
 
-void __attribute__ ((format (printf, 1, 2))) http_log(const char *fmt, ...)
+static void __attribute__ ((format (printf, 1, 2))) http_log(const char *fmt, ...)
 {
     va_list vargs;
     va_start(vargs, fmt);