diff --git a/win32ss/user/user32/windows/window.c b/win32ss/user/user32/windows/window.c
index ccf0670bc1..8fd5e7d4fa 100644
--- a/win32ss/user/user32/windows/window.c
+++ b/win32ss/user/user32/windows/window.c
@@ -381,7 +381,11 @@ CreateWindowExA(DWORD dwExStyle,
         if (pWndParent->fnid != FNID_MDICLIENT) // wine uses WIN_ISMDICLIENT
         {
            WARN("WS_EX_MDICHILD, but parent %p is not MDIClient\n", hWndParent);
+#ifdef __REACTOS__
+           goto skip_mdi;
+#else
            return NULL;
+#endif
         }
 
         /* lpParams of WM_[NC]CREATE is different for MDI children.
@@ -446,7 +450,9 @@ CreateWindowExA(DWORD dwExStyle,
                 nHeight = mPos[1].y;
         }
     }
-
+#ifdef __REACTOS__
+skip_mdi:
+#endif
     hwnd = User32CreateWindowEx(dwExStyle,
                                 lpClassName,
                                 lpWindowName,
@@ -506,7 +512,11 @@ CreateWindowExW(DWORD dwExStyle,
         if (pWndParent->fnid != FNID_MDICLIENT)
         {
            WARN("WS_EX_MDICHILD, but parent %p is not MDIClient\n", hWndParent);
+#ifdef __REACTOS__
+           goto skip_mdi;
+#else
            return NULL;
+#endif
         }
 
         /* lpParams of WM_[NC]CREATE is different for MDI children.
@@ -571,7 +581,9 @@ CreateWindowExW(DWORD dwExStyle,
                 nHeight = mPos[1].y;
         }
     }
-
+#ifdef __REACTOS__
+skip_mdi:
+#endif
     hwnd = User32CreateWindowEx(dwExStyle,
                                 (LPCSTR)lpClassName,
                                 (LPCSTR)lpWindowName,