diff --git a/libavcodec/dpx_parser.c b/libavcodec/dpx_parser.c
index db6ebf7ddf731d4a28aa385246707e8c04963dad..dd2a335c67cf33ec0ad51f7c60af7d57da164d8d 100644
--- a/libavcodec/dpx_parser.c
+++ b/libavcodec/dpx_parser.c
@@ -89,7 +89,7 @@ static int dpx_parse(AVCodecParserContext *s, AVCodecContext *avctx,
         } else if (d->index > 17) {
             if (d->pc.state == MKBETAG('S','D','P','X') ||
                 d->pc.state == MKTAG('S','D','P','X')) {
-                next = i - 4;
+                next = i - 3;
                 break;
             }
         }