diff --git a/webrtc/modules/video_coding/codecs/test/videoprocessor_integrationtest.cc b/webrtc/modules/video_coding/codecs/test/videoprocessor_integrationtest.cc
index 6f7a6178e8..147a9a2b78 100644
--- a/webrtc/modules/video_coding/codecs/test/videoprocessor_integrationtest.cc
+++ b/webrtc/modules/video_coding/codecs/test/videoprocessor_integrationtest.cc
@@ -703,6 +703,28 @@ TEST_F(VideoProcessorIntegrationTest,
                          rc_metrics);
 }
 
+// VP9: Run with no packet loss and denoiser on. One key frame (first frame).
+TEST_F(VideoProcessorIntegrationTest, ProcessNoLossDenoiserOnVP9) {
+  // Bitrate and frame rate profile.
+  RateProfile rate_profile;
+  SetRateProfilePars(&rate_profile, 0, 500, 30, 0);
+  rate_profile.frame_index_rate_update[1] = kNbrFramesShort + 1;
+  rate_profile.num_frames = kNbrFramesShort;
+  // Codec/network settings.
+  CodecConfigPars process_settings;
+  SetCodecParameters(&process_settings, kVideoCodecVP9, 0.0f, -1, 1, false,
+                     true, true, false);
+  // Metrics for expected quality.
+  QualityMetrics quality_metrics;
+  SetQualityMetrics(&quality_metrics, 36.8, 35.8, 0.92, 0.91);
+  // Metrics for rate control.
+  RateControlMetrics rc_metrics[1];
+  SetRateControlMetrics(rc_metrics, 0, 0, 40, 20, 10, 20, 0);
+  ProcessFramesAndVerify(quality_metrics,
+                         rate_profile,
+                         process_settings,
+                         rc_metrics);
+}
 
 // TODO(marpan): Add temporal layer test for VP9, once changes are in
 // vp9 wrapper for this.
diff --git a/webrtc/modules/video_coding/codecs/vp9/vp9_impl.cc b/webrtc/modules/video_coding/codecs/vp9/vp9_impl.cc
index 8af2c77e8b..fb167d75a6 100644
--- a/webrtc/modules/video_coding/codecs/vp9/vp9_impl.cc
+++ b/webrtc/modules/video_coding/codecs/vp9/vp9_impl.cc
@@ -223,11 +223,12 @@ int VP9EncoderImpl::InitAndSetControlSettings(const VideoCodec* inst) {
   // The number tile columns will be capped by the encoder based on image size
   // (minimum width of tile column is 256 pixels, maximum is 4096).
   vpx_codec_control(encoder_, VP9E_SET_TILE_COLUMNS, (config_->g_threads >> 1));
-  // TODO(marpan): Enable in future libvpx roll: waiting for SSE2 optimization.
-// #if !defined(WEBRTC_ARCH_ARM)
-  // vpx_codec_control(encoder_, VP9E_SET_NOISE_SENSITIVITY,
-  //                   inst->codecSpecific.VP9.denoisingOn ? 1 : 0);
-// #endif
+#if !defined(WEBRTC_ARCH_ARM)
+  // Note denoiser is still off by default until further testing/optimization,
+  // i.e., codecSpecific.VP9.denoisingOn == 0.
+  vpx_codec_control(encoder_, VP9E_SET_NOISE_SENSITIVITY,
+                    inst->codecSpecific.VP9.denoisingOn ? 1 : 0);
+#endif
   inited_ = true;
   return WEBRTC_VIDEO_CODEC_OK;
 }