diff --git a/src/bin/engine_software_16_wince.c b/src/bin/engine_software_16_wince.c
index 07f2c07..3f1586f 100644
--- a/src/bin/engine_software_16_wince.c
+++ b/src/bin/engine_software_16_wince.c
@@ -119,6 +119,9 @@ MainWndProc(HWND   hwnd,
      case WM_CLOSE:
        PostQuitMessage(0);
        return 0;
+     case WM_PAINT:
+       ValidateRect(hwnd, NULL);
+       return 0;
      case WM_KEYDOWN:
      case WM_SYSKEYDOWN: {
         if (backend == 1)