diff --git a/libavformat/mux.c b/libavformat/mux.c
index 96eecb5a93f1cc0c58b760083450104a9e8bbf3b..f7a7f3a2c9b4e9023836909c1b7f6a57f57127ef 100644
--- a/libavformat/mux.c
+++ b/libavformat/mux.c
@@ -305,7 +305,7 @@ int avformat_write_header(AVFormatContext *s, AVDictionary **options)
             return ret;
     }
 
-    if ((ret = init_pts(s) < 0))
+    if ((ret = init_pts(s)) < 0)
         return ret;
 
     return 0;