diff --git a/tdutils/td/utils/port/platform.h b/tdutils/td/utils/port/platform.h
index 07e9aa959..64807bf4c 100644
--- a/tdutils/td/utils/port/platform.h
+++ b/tdutils/td/utils/port/platform.h
@@ -9,7 +9,7 @@
 // clang-format off
 
 /*** Platform macros ***/
-#if defined(_WIN32)
+#if defined(_WIN32) || defined(_WINDOWS) // _WINDOWS is defined by CMake
   #if defined(__cplusplus_winrt)
     #define TD_WINRT 1
   #endif