diff --git a/modules/rtp_rtcp/BUILD.gn b/modules/rtp_rtcp/BUILD.gn
index 48610be..3d7eeab 100644
--- a/modules/rtp_rtcp/BUILD.gn
+++ b/modules/rtp_rtcp/BUILD.gn
@@ -236,6 +236,7 @@
     "../../api/units:timestamp",
     "../../api/video:video_bitrate_allocation",
     "../../api/video:video_bitrate_allocator",
+    "../../api/video:video_codec_constants",
     "../../api/video:video_frame",
     "../../api/video:video_frame_type",
     "../../api/video:video_rtp_headers",
diff --git a/modules/rtp_rtcp/source/rtp_format_vp9.cc b/modules/rtp_rtcp/source/rtp_format_vp9.cc
index 3c40e55..f83a12b 100644
--- a/modules/rtp_rtcp/source/rtp_format_vp9.cc
+++ b/modules/rtp_rtcp/source/rtp_format_vp9.cc
@@ -12,6 +12,7 @@
 
 #include <string.h>
 
+#include "api/video/video_codec_constants.h"
 #include "modules/rtp_rtcp/source/rtp_packet_to_send.h"
 #include "modules/video_coding/codecs/interface/common_constants.h"
 #include "rtc_base/bit_buffer.h"
@@ -316,6 +317,8 @@
   RETURN_FALSE_ON_ERROR(parser->ReadBits(&d_bit, 1));
   vp9->temporal_idx = t;
   vp9->temporal_up_switch = u_bit ? true : false;
+  if (s >= kMaxSpatialLayers)
+    return false;
   vp9->spatial_idx = s;
   vp9->inter_layer_predicted = d_bit ? true : false;
   return true;