diff --git a/src/win32_window.c b/src/win32_window.c
index b7e679e9..1f58acb6 100644
--- a/src/win32_window.c
+++ b/src/win32_window.c
@@ -1725,7 +1725,7 @@ void _glfwPlatformSetWindowMonitor(_GLFWwindow* window,
 
     _glfwInputWindowMonitor(window, monitor);
 
-    if (monitor)
+    if (window->monitor)
     {
         MONITORINFO mi = { sizeof(mi) };
         UINT flags = SWP_SHOWWINDOW | SWP_NOACTIVATE | SWP_NOCOPYBITS;