diff --git a/libavcodec/h264.c b/libavcodec/h264.c
index be0dca4959..c70b2595f5 100644
--- a/libavcodec/h264.c
+++ b/libavcodec/h264.c
@@ -685,6 +685,10 @@ static int decode_init_thread_copy(AVCodecContext *avctx)
     memset(h->sps_buffers, 0, sizeof(h->sps_buffers));
     memset(h->pps_buffers, 0, sizeof(h->pps_buffers));
 
+    h->rbsp_buffer[0]      = NULL;
+    h->rbsp_buffer[1]      = NULL;
+    h->rbsp_buffer_size[0] = 0;
+    h->rbsp_buffer_size[1] = 0;
     h->context_initialized = 0;
 
     return 0;