diff --git a/src/wndproc.c b/src/wndproc.c
index 76f3387..eebace2 100644
--- a/src/wndproc.c
+++ b/src/wndproc.c
@@ -49,6 +49,7 @@ LRESULT CALLBACK fake_WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam
     case WM_NCPAINT:
     case WM_CANCELMODE:
     case WM_DISPLAYCHANGE:
+    case WM_NCCALCSIZE:
     {
         return real_DefWindowProcA(hWnd, uMsg, wParam, lParam);
     }