diff --git a/dlls/user32/message.c b/dlls/user32/message.c
index cdf84523be0..00a2a89e08a 100644
--- a/dlls/user32/message.c
+++ b/dlls/user32/message.c
@@ -2296,24 +2296,8 @@ BOOL WINAPI SendMessageCallbackA( HWND hwnd, UINT msg, WPARAM wparam, LPARAM lpa
 BOOL WINAPI SendMessageCallbackW( HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam,
                                   SENDASYNCPROC callback, ULONG_PTR data )
 {
-    struct send_message_info info;
-
-    if (is_pointer_message( msg, wparam ))
-    {
-        SetLastError( ERROR_MESSAGE_SYNC_ONLY );
-        return FALSE;
-    }
-
-    info.type     = MSG_CALLBACK;
-    info.hwnd     = hwnd;
-    info.msg      = msg;
-    info.wparam   = wparam;
-    info.lparam   = lparam;
-    info.callback = callback;
-    info.data     = data;
-    info.flags    = 0;
-
-    return send_message( &info, NULL, TRUE );
+    struct send_message_callback_params params = { .callback = callback, .data = data };
+    return NtUserMessageCall( hwnd, msg, wparam, lparam, &params, FNID_SENDMESSAGECALLBACK, FALSE );
 }
 
 
diff --git a/dlls/win32u/message.c b/dlls/win32u/message.c
index a8db3016358..67008dcd2b5 100644
--- a/dlls/win32u/message.c
+++ b/dlls/win32u/message.c
@@ -2372,6 +2372,31 @@ static BOOL send_notify_message( HWND hwnd, UINT msg, WPARAM wparam, LPARAM lpar
     return process_message( &info, NULL, ansi );
 }
 
+/* see SendMessageCallbackW */
+static BOOL send_message_callback( HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam,
+                                   const struct send_message_callback_params *params, BOOL ansi )
+{
+    struct send_message_info info;
+
+    if (is_pointer_message( msg, wparam ))
+    {
+        SetLastError( ERROR_MESSAGE_SYNC_ONLY );
+        return FALSE;
+    }
+
+    info.type     = MSG_CALLBACK;
+    info.hwnd     = hwnd;
+    info.msg      = msg;
+    info.wparam   = wparam;
+    info.lparam   = lparam;
+    info.callback = params->callback;
+    info.data     = params->data;
+    info.flags    = 0;
+    info.wm_char  = WMCHAR_MAP_SENDMESSAGETIMEOUT;
+
+    return process_message( &info, NULL, ansi );
+}
+
 /***********************************************************************
  *           NtUserPostMessage  (win32u.@)
  */
@@ -2402,6 +2427,8 @@ LRESULT WINAPI NtUserMessageCall( HWND hwnd, UINT msg, WPARAM wparam, LPARAM lpa
         }
     case FNID_SENDNOTIFYMESSAGE:
         return send_notify_message( hwnd, msg, wparam, lparam, ansi );
+    case FNID_SENDMESSAGECALLBACK:
+        return send_message_callback( hwnd, msg, wparam, lparam, (void *)result_info, ansi );
     case FNID_SPYENTER:
         spy_enter_message( ansi, hwnd, msg, wparam, lparam );
         return 0;
diff --git a/dlls/win32u/tests/win32u.c b/dlls/win32u/tests/win32u.c
index e93ad416d2b..a463b6269a6 100644
--- a/dlls/win32u/tests/win32u.c
+++ b/dlls/win32u/tests/win32u.c
@@ -466,7 +466,6 @@ static void test_message_call(void)
 
     res = NtUserMessageCall( hwnd, WM_USER, 1, 2, &callback_params,
                              FNID_SENDMESSAGECALLBACK, FALSE );
-    todo_wine
     ok( res == 1, "res = %Iu\n", res );
 
     DestroyWindow( hwnd );