diff --git a/common_video/h264/h264_bitstream_parser.cc b/common_video/h264/h264_bitstream_parser.cc
index 56158fd340..620dc7f35d 100644
--- a/common_video/h264/h264_bitstream_parser.cc
+++ b/common_video/h264/h264_bitstream_parser.cc
@@ -118,13 +118,15 @@ H264BitstreamParser::Result H264BitstreamParser::ParseNonParameterSetNalu(
       if (slice_reader.Read<bool>()) {
         // num_ref_idx_l0_active_minus1: ue(v)
         num_ref_idx_l0_active_minus1 = slice_reader.ReadExponentialGolomb();
-        if (num_ref_idx_l0_active_minus1 > H264::kMaxReferenceIndex) {
+        if (!slice_reader.Ok() ||
+            num_ref_idx_l0_active_minus1 > H264::kMaxReferenceIndex) {
           return kInvalidStream;
         }
         if (slice_type == H264::SliceType::kB) {
           // num_ref_idx_l1_active_minus1: ue(v)
           num_ref_idx_l1_active_minus1 = slice_reader.ReadExponentialGolomb();
-          if (num_ref_idx_l1_active_minus1 > H264::kMaxReferenceIndex) {
+          if (!slice_reader.Ok() ||
+              num_ref_idx_l1_active_minus1 > H264::kMaxReferenceIndex) {
             return kInvalidStream;
           }
         }