diff --git a/dlls/user/user32.spec b/dlls/user/user32.spec
index 5ff6d4a0211..a6549a33c67 100644
--- a/dlls/user/user32.spec
+++ b/dlls/user/user32.spec
@@ -736,6 +736,5 @@
 @ cdecl WIN_LinkWindow(long long long)
 @ cdecl WIN_ListChildren(long)
 @ cdecl WIN_ReleaseWndPtr(ptr)
-@ cdecl WIN_SetExStyle(long long)
 @ cdecl WIN_SetStyle(long long long)
 @ cdecl WIN_UnlinkWindow(long)
diff --git a/include/win.h b/include/win.h
index 8605b56fc84..11deac68929 100644
--- a/include/win.h
+++ b/include/win.h
@@ -87,7 +87,6 @@ extern void WIN_LinkWindow( HWND hwnd, HWND parent, HWND hwndInsertAfter );
 extern void WIN_UnlinkWindow( HWND hwnd );
 extern HWND WIN_SetOwner( HWND hwnd, HWND owner );
 extern ULONG WIN_SetStyle( HWND hwnd, ULONG set_bits, ULONG clear_bits );
-extern LONG WIN_SetExStyle( HWND hwnd, LONG style );
 extern BOOL WIN_GetRectangles( HWND hwnd, RECT *rectWindow, RECT *rectClient );
 extern LRESULT WIN_DestroyWindow( HWND hwnd );
 extern void WIN_DestroyThreadWindows( HWND hwnd );
diff --git a/windows/win.c b/windows/win.c
index e54792cb940..5f6190ed71c 100644
--- a/windows/win.c
+++ b/windows/win.c
@@ -567,46 +567,6 @@ ULONG WIN_SetStyle( HWND hwnd, ULONG set_bits, ULONG clear_bits )
 }
 
 
-/***********************************************************************
- *           WIN_SetExStyle
- *
- * Change the extended style of a window.
- */
-LONG WIN_SetExStyle( HWND hwnd, LONG style )
-{
-    LONG ret = 0;
-    WND *win = WIN_GetPtr( hwnd );
-
-    if (!win) return 0;
-    if (win == WND_OTHER_PROCESS)
-    {
-        if (IsWindow(hwnd))
-            ERR( "cannot set exstyle %lx on other process window %p\n", style, hwnd );
-        return 0;
-    }
-    if (style == win->dwExStyle)
-    {
-        WIN_ReleasePtr( win );
-        return style;
-    }
-    SERVER_START_REQ( set_window_info )
-    {
-        req->handle   = hwnd;
-        req->flags    = SET_WIN_EXSTYLE;
-        req->ex_style = style;
-        req->extra_offset = -1;
-        if (!wine_server_call( req ))
-        {
-            ret = reply->old_ex_style;
-            win->dwExStyle = style;
-        }
-    }
-    SERVER_END_REQ;
-    WIN_ReleasePtr( win );
-    return ret;
-}
-
-
 /***********************************************************************
  *           WIN_GetRectangles
  *