diff --git a/webrtc/modules/desktop_capture/win/dxgi_output_duplicator.h b/webrtc/modules/desktop_capture/win/dxgi_output_duplicator.h
index 5a7053ab25..2ac0a75eab 100644
--- a/webrtc/modules/desktop_capture/win/dxgi_output_duplicator.h
+++ b/webrtc/modules/desktop_capture/win/dxgi_output_duplicator.h
@@ -128,7 +128,7 @@ class DxgiOutputDuplicator {
   std::unique_ptr<SharedDesktopFrame> last_frame_;
   DesktopVector last_frame_offset_;
 
-  int64_t num_frames_captured_;
+  int64_t num_frames_captured_ = 0;
 };
 
 }  // namespace webrtc