diff --git a/reactos/include/reactos/win32k/ntuser.h b/reactos/include/reactos/win32k/ntuser.h
index 4b3c838ef4b..0259037a007 100644
--- a/reactos/include/reactos/win32k/ntuser.h
+++ b/reactos/include/reactos/win32k/ntuser.h
@@ -3136,12 +3136,6 @@ NtUserGetScrollInfo(
   int fnBar,
   LPSCROLLINFO lpsi);
 
-/* Should be done in usermode and use NtUserGetCPD. */
-LONG
-NTAPI
-NtUserGetWindowLong(HWND hWnd, DWORD Index, BOOL Ansi);
-
-
 /* (other FocusedItem values give the position of the focused item) */
 #define NO_SELECTED_ITEM  0xffff
 
diff --git a/reactos/subsystems/win32/win32k/ntuser/window.c b/reactos/subsystems/win32/win32k/ntuser/window.c
index 069f2ea3987..7946e494795 100644
--- a/reactos/subsystems/win32/win32k/ntuser/window.c
+++ b/reactos/subsystems/win32/win32k/ntuser/window.c
@@ -3822,35 +3822,6 @@ UserGetWindowLong(HWND hWnd, DWORD Index, BOOL Ansi)
    return Result;
 }
 
-/*
- * NtUserGetWindowLong
- *
- * The NtUserGetWindowLong function retrieves information about the specified
- * window. The function also retrieves the 32-bit (long) value at the
- * specified offset into the extra window memory.
- *
- * Status
- *    @implemented
- */
-
-LONG APIENTRY
-NtUserGetWindowLong(HWND hWnd, DWORD Index, BOOL Ansi)
-{
-   DECLARE_RETURN(LONG);
-
-   DPRINT("Enter NtUserGetWindowLong(%x,%d,%d)\n", hWnd, (INT)Index, Ansi);
-   UserEnterExclusive();
-
-   RETURN(UserGetWindowLong(hWnd, Index, Ansi));
-
-CLEANUP:
-   DPRINT("Leave NtUserGetWindowLong, ret=%i\n",_ret_);
-   UserLeave();
-   END_CLEANUP;
-}
-
-
-
 LONG FASTCALL
 co_UserSetWindowLong(HWND hWnd, DWORD Index, LONG NewValue, BOOL Ansi)
 {
diff --git a/reactos/subsystems/win32/win32k/w32ksvc.db b/reactos/subsystems/win32/win32k/w32ksvc.db
index a14cb7e02f7..71b25210df7 100644
--- a/reactos/subsystems/win32/win32k/w32ksvc.db
+++ b/reactos/subsystems/win32/win32k/w32ksvc.db
@@ -690,7 +690,6 @@ NtUserGetLastInputInfo                  1
 NtUserGetMinMaxInfo                     3
 NtUserGetMonitorInfo                    2
 NtUserGetScrollInfo                     3
-NtUserGetWindowLong                     3
 NtUserMenuInfo                          3
 NtUserMenuItemInfo                      5
 NtUserMonitorFromPoint                  3