diff --git a/libavcodec/parser.c b/libavcodec/parser.c
index ab3bf8ddb3..f3e7ee3356 100644
--- a/libavcodec/parser.c
+++ b/libavcodec/parser.c
@@ -70,6 +70,7 @@ AVCodecParserContext *av_parser_init(int codec_id)
         }
     }
     s->fetch_timestamp=1;
+    s->pict_type = FF_I_TYPE;
     return s;
 }