libavcodec/libx264.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/libavcodec/libx264.c b/libavcodec/libx264.c
index 58fcfb0..b4a14cf 100644
--- a/libavcodec/libx264.c
+++ b/libavcodec/libx264.c
@@ -560,13 +560,15 @@ static av_cold int X264_init(AVCodecContext *avctx)
         x4->params.b_bluray_compat = x4->bluray_compat;
         x4->params.b_vfr_input = 0;
     }
-    if (x4->avcintra_class >= 0)
+    if (x4->avcintra_class >= 0) {
 #if X264_BUILD >= 142
         x4->params.i_avcintra_class = x4->avcintra_class;
+        avctx->flags &= ~CODEC_FLAG_GLOBAL_HEADER;
 #else
         av_log(avctx, AV_LOG_ERROR,
                "x264 too old for AVC Intra, at least version 142 needed\n");
 #endif
+    }
     if (x4->b_bias != INT_MIN)
         x4->params.i_bframe_bias              = x4->b_bias;
     if (x4->b_pyramid >= 0)