diff --git a/win32ss/user/ntuser/display.c b/win32ss/user/ntuser/display.c
index 803236468fb..25b1f947014 100644
--- a/win32ss/user/ntuser/display.c
+++ b/win32ss/user/ntuser/display.c
@@ -830,6 +830,8 @@ UserChangeDisplaySettings(
             gpsi->Planes      = ppdev->gdiinfo.cPlanes;
             gpsi->BitsPixel   = ppdev->gdiinfo.cBitsPixel;
             gpsi->BitCount    = gpsi->Planes * gpsi->BitsPixel;
+            gpsi->aiSysMet[SM_CXSCREEN] = ppdev->gdiinfo.ulHorzRes;
+            gpsi->aiSysMet[SM_CYSCREEN] = ppdev->gdiinfo.ulVertRes;
             if (ppdev->gdiinfo.flRaster & RC_PALETTE)
             {
                 gpsi->PUSIFlags |= PUSIF_PALETTEDISPLAY;
@@ -855,13 +857,13 @@ UserChangeDisplaySettings(
         //IntHideDesktop(pdesk);
 
         /* Send WM_DISPLAYCHANGE to all toplevel windows */
-        co_IntSendMessageTimeout(HWND_BROADCAST,
-                                 WM_DISPLAYCHANGE,
-                                 (WPARAM)ppdev->gdiinfo.cBitsPixel,
-                                 (LPARAM)(ppdev->gdiinfo.ulHorzRes + (ppdev->gdiinfo.ulVertRes << 16)),
-                                 SMTO_NORMAL,
-                                 100,
-                                 &ulResult);
+        co_IntSendMessageTimeout( HWND_BROADCAST,
+                                  WM_DISPLAYCHANGE,
+                                  gpsi->BitCount,
+                                  MAKELONG(gpsi->aiSysMet[SM_CXSCREEN], gpsi->aiSysMet[SM_CYSCREEN]),
+                                  SMTO_NORMAL,
+                                  100,
+                                  &ulResult );
 
         ERR("BitCount New %d Orig %d ChkNew %d\n",gpsi->BitCount,OrigBC,ppdev->gdiinfo.cBitsPixel);