diff --git a/modules/desktop_capture/blank_detector_desktop_capturer_wrapper.cc b/modules/desktop_capture/blank_detector_desktop_capturer_wrapper.cc
index 061aab0..cf2d03d 100644
--- a/modules/desktop_capture/blank_detector_desktop_capturer_wrapper.cc
+++ b/modules/desktop_capture/blank_detector_desktop_capturer_wrapper.cc
@@ -32,8 +32,8 @@
 
 void BlankDetectorDesktopCapturerWrapper::Start(
     DesktopCapturer::Callback* callback) {
-  capturer_->Start(this);
   callback_ = callback;
+  capturer_->Start(this);
 }
 
 void BlankDetectorDesktopCapturerWrapper::SetSharedMemoryFactory(
diff --git a/modules/desktop_capture/capture_result_desktop_capturer_wrapper.cc b/modules/desktop_capture/capture_result_desktop_capturer_wrapper.cc
index 5e0d264..e1d4b99 100644
--- a/modules/desktop_capture/capture_result_desktop_capturer_wrapper.cc
+++ b/modules/desktop_capture/capture_result_desktop_capturer_wrapper.cc
@@ -30,6 +30,7 @@
 void CaptureResultDesktopCapturerWrapper::Start(Callback* callback) {
   if ((callback_ == nullptr) != (callback == nullptr)) {
     if (callback) {
+      callback_ = callback;
       base_capturer_->Start(this);
     } else {
       base_capturer_->Start(nullptr);
diff --git a/modules/desktop_capture/fallback_desktop_capturer_wrapper.cc b/modules/desktop_capture/fallback_desktop_capturer_wrapper.cc
index 5f60f1e..48ee6e2 100644
--- a/modules/desktop_capture/fallback_desktop_capturer_wrapper.cc
+++ b/modules/desktop_capture/fallback_desktop_capturer_wrapper.cc
@@ -80,6 +80,7 @@
 
 void FallbackDesktopCapturerWrapper::Start(
     DesktopCapturer::Callback* callback) {
+  callback_ = callback;
   // FallbackDesktopCapturerWrapper catchs the callback of the main capturer,
   // and checks its return value to decide whether the secondary capturer should
   // be involved.
@@ -88,7 +89,6 @@
   // FallbackDesktopCapturerWrapper won't check its return value any more. It
   // will directly return to the input |callback|.
   secondary_capturer_->Start(callback);
-  callback_ = callback;
 }
 
 void FallbackDesktopCapturerWrapper::SetSharedMemoryFactory(