diff --git a/libavformat/options.c b/libavformat/options.c
index 4b08f3f199..d238dd5ab7 100644
--- a/libavformat/options.c
+++ b/libavformat/options.c
@@ -117,6 +117,7 @@ AVFormatContext *avformat_alloc_context(void)
         return NULL;
     }
     ic->internal->offset = AV_NOPTS_VALUE;
+    ic->internal->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
 
     return ic;
 }