diff --git a/cmake/gtest.cmake b/cmake/gtest.cmake
index 993330f989..cd312a8c3c 100644
--- a/cmake/gtest.cmake
+++ b/cmake/gtest.cmake
@@ -68,6 +68,7 @@ set(GTEST_CXX_FLAGS
      -Wno-deprecated
      -Wno-unsafe-buffer-usage
      -Wno-float-equal
+     -Wno-missing-variable-declarations
 )
 
 if(WIN32)