diff --git a/libavcodec/dnxhd_parser.c b/libavcodec/dnxhd_parser.c
index 31a3158fea..63b4ff89e1 100644
--- a/libavcodec/dnxhd_parser.c
+++ b/libavcodec/dnxhd_parser.c
@@ -79,8 +79,9 @@ static int dnxhd_find_frame_end(DNXHDParserContext *dctx,
                     if (remaining <= 0)
                         continue;
                 }
+                remaining += i - 47;
                 dctx->remaining = remaining;
-                if (buf_size - i + 47 >= dctx->remaining) {
+                if (buf_size >= dctx->remaining) {
                     pc->frame_start_found = 0;
                     pc->state64 = -1;
                     dctx->cur_byte = 0;