diff --git a/reactos/include/reactos/drivers/directx/dxeng.h b/reactos/include/reactos/drivers/directx/dxeng.h
index 41e4cd7b55d..69335b2cf67 100644
--- a/reactos/include/reactos/drivers/directx/dxeng.h
+++ b/reactos/include/reactos/drivers/directx/dxeng.h
@@ -115,6 +115,7 @@ DWORD DxEngSyncPaletteTableWithDevice(DWORD x1, DWORD x2);
 DWORD DxEngSetPaletteState(DWORD x1, DWORD x2, DWORD x3);
 DWORD DxEngGetRedirectionBitmap(DWORD x1);
 DWORD DxEngLoadImage(DWORD x1,DWORD x2);
+DWORD DxEngIncDispUniq();
 
 
 
diff --git a/reactos/subsystems/win32/win32k/ntddraw/dxeng.c b/reactos/subsystems/win32/win32k/ntddraw/dxeng.c
index 9f916d6d046..14bb3bb9c24 100644
--- a/reactos/subsystems/win32/win32k/ntddraw/dxeng.c
+++ b/reactos/subsystems/win32/win32k/ntddraw/dxeng.c
@@ -483,4 +483,13 @@ DWORD DxEngLoadImage(DWORD x1,DWORD x2)
     return FALSE;
 }
 
+/************************************************************************/
+/* DxEngIncDispUniq                                                       */
+/************************************************************************/
+DWORD DxEngIncDispUniq()
+{
+    UNIMPLEMENTED;
+    return FALSE;
+}
+