diff --git a/modules/desktop_capture/win/window_capture_utils.cc b/modules/desktop_capture/win/window_capture_utils.cc
index c878a63..03e0219 100644
--- a/modules/desktop_capture/win/window_capture_utils.cc
+++ b/modules/desktop_capture/win/window_capture_utils.cc
@@ -21,6 +21,7 @@
     return false;
   }
   WINDOWPLACEMENT window_placement;
+  window_placement.length = sizeof(window_placement);
   if (!GetWindowPlacement(window, &window_placement)) {
     return false;
   }