diff --git a/contrib/CMakeLists.txt b/contrib/CMakeLists.txt
index 9ef2a71def..2cbc4fb0c2 100644
--- a/contrib/CMakeLists.txt
+++ b/contrib/CMakeLists.txt
@@ -227,9 +227,13 @@ if(${BUILD_WITH_ROCKSDB})
         SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-error=maybe-uninitialized")
     endif(${TD_LINUX})
 
-    if($${TD_DARWIN})
+    if(${TD_DARWIN})
         SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-error=maybe-uninitialized")
     endif(${TD_DARWIN})
+    if (${TD_WINDOWS})
+        SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /wd4267")
+    endif(${TD_WINDOWS})
+
     option(WITH_TESTS "" OFF)
     option(WITH_BENCHMARK_TOOLS "" OFF)
     option(WITH_TOOLS "" OFF)