diff --git a/cmake/re-config.cmake b/cmake/re-config.cmake
index 023714475..68c0c80cd 100644
--- a/cmake/re-config.cmake
+++ b/cmake/re-config.cmake
@@ -140,7 +140,6 @@ if(WIN32)
   list(APPEND RE_DEFINITIONS
     WIN32 
     _WIN32_WINNT=0x0600
-    _UCRT
   )
 
   unset(CMAKE_EXTRA_INCLUDE_FILES)