diff --git a/media/base/videocapturer.cc b/media/base/videocapturer.cc
index 592f3e20e3..88cf9a8e3e 100644
--- a/media/base/videocapturer.cc
+++ b/media/base/videocapturer.cc
@@ -17,6 +17,7 @@
 #include "api/video/i420_buffer.h"
 #include "api/video/video_frame.h"
 #include "rtc_base/logging.h"
+#include "system_wrappers/include/field_trial.h"
 
 namespace cricket {
 
@@ -26,6 +27,8 @@ static const int64_t kMaxDistance = ~(static_cast<int64_t>(1) << 63);
 #ifdef WEBRTC_LINUX
 static const int kYU12Penalty = 16;  // Needs to be higher than MJPG index.
 #endif
+static const char* kSimulcastScreenshareFieldTrialName =
+    "WebRTC-SimulcastScreenshare";
 
 }  // namespace
 
@@ -174,7 +177,10 @@ bool VideoCapturer::AdaptFrame(int width,
     return false;
   }
 
-  if (enable_video_adapter_ && !IsScreencast()) {
+  bool simulcast_screenshare_enabled =
+      webrtc::field_trial::IsEnabled(kSimulcastScreenshareFieldTrialName);
+  if (enable_video_adapter_ &&
+      (!IsScreencast() || simulcast_screenshare_enabled)) {
     if (!video_adapter_.AdaptFrameResolution(
             width, height, camera_time_us * rtc::kNumNanosecsPerMicrosec,
             crop_width, crop_height, out_width, out_height)) {