diff --git a/reactos/dll/win32/user32/windows/window.c b/reactos/dll/win32/user32/windows/window.c
index 5f2826a0cdf..468536ee290 100644
--- a/reactos/dll/win32/user32/windows/window.c
+++ b/reactos/dll/win32/user32/windows/window.c
@@ -342,18 +342,6 @@ CreateWindowExA(DWORD dwExStyle,
         POINT mPos[2];
         UINT id = 0;
         HWND top_child;
-        PWND WndParent;
-        PCLS pcls;
-
-        if(!(WndParent = ValidateHwnd(hWndParent)) ||
-           !(pcls = DesktopPtrToUser(WndParent->pcls)))
-            return 0;
-
-        if (pcls->fnid != FNID_MDICLIENT)
-        {
-            ERR("WS_EX_MDICHILD, but parent %p is not MDIClient\n", hWndParent);
-            return 0;
-        }
 
         /* lpParams of WM_[NC]CREATE is different for MDI children.
         * MDICREATESTRUCT members have the originally passed values.
@@ -466,24 +454,6 @@ CreateWindowExW(DWORD dwExStyle,
         POINT mPos[2];
         UINT id = 0;
         HWND top_child;
-        PWND WndParent;
-        PCLS pcls;
-
-        WndParent = ValidateHwnd(hWndParent);
-
-        if(!WndParent)
-            return 0;
-
-        pcls = DesktopPtrToUser(WndParent->pcls);
-
-        if(!pcls)
-            return 0;
-
-        if (pcls->fnid != FNID_MDICLIENT)
-        {
-            ERR("WS_EX_MDICHILD, but parent %p is not MDIClient\n", hWndParent);
-            return 0;
-        }
 
         /* lpParams of WM_[NC]CREATE is different for MDI children.
         * MDICREATESTRUCT members have the originally passed values.