diff --git a/reactos/subsystems/win32/win32k/ntddraw/dxeng.c b/reactos/subsystems/win32/win32k/ntddraw/dxeng.c
index 34113fe0bc9..5d267539fe0 100644
--- a/reactos/subsystems/win32/win32k/ntddraw/dxeng.c
+++ b/reactos/subsystems/win32/win32k/ntddraw/dxeng.c
@@ -96,11 +96,11 @@ DxEngRedrawDesktop()
 ULONG
 DxEngDispUniq()
 {
-    /* FIXME DisplayUniqVisrgn from gdishare memory */
-    UNIMPLEMENTED;
-    return FALSE;
+    return GdiHandleTable->flDeviceUniq;
 }
 
+ULONG gulVisRgnUniqueness; // Inc count everytime client region is updated.
+
 /************************************************************************/
 /* DxEngVisRgnUniq                                                      */
 /************************************************************************/
@@ -108,9 +108,7 @@ DxEngDispUniq()
 ULONG
 DxEngVisRgnUniq()
 {
-    /* FIXME DisplayUniqVisrgn from gdishare memory */
-    UNIMPLEMENTED;
-    return FALSE;
+    return gulVisRgnUniqueness;
 }
 
 /************************************************************************/