diff --git a/libavcodec/libx264.c b/libavcodec/libx264.c
index 0db859419f..6f68e8f8fe 100644
--- a/libavcodec/libx264.c
+++ b/libavcodec/libx264.c
@@ -559,6 +559,7 @@ static const AVCodecDefault x264_defaults[] = {
     { "cmp",              "-1" },
     { "threads",          AV_STRINGIFY(X264_THREADS_AUTO) },
     { "thread_type",      "0" },
+    { "flags",            "+cgop" },
     { NULL },
 };