diff --git a/contrib/CMakeLists.txt b/contrib/CMakeLists.txt
index 1bc7b67a83..9ef2a71def 100644
--- a/contrib/CMakeLists.txt
+++ b/contrib/CMakeLists.txt
@@ -223,9 +223,13 @@ endif(${BUILD_WITH_LEVELDB})
 # rocksdb
 # To support rocksdb build on ubuntu: sudo apt-get install libgflags-dev
 if(${BUILD_WITH_ROCKSDB})
-    if(${TD_LINUX} OR ${TD_DARWIN})
+    if(${TD_LINUX})
         SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-error=maybe-uninitialized")
     endif(${TD_LINUX})
+
+    if($${TD_DARWIN})
+        SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-error=maybe-uninitialized")
+    endif(${TD_DARWIN})
     option(WITH_TESTS "" OFF)
     option(WITH_BENCHMARK_TOOLS "" OFF)
     option(WITH_TOOLS "" OFF)