diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3987eac..973e158 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -223,7 +223,7 @@ elseif(CMAKE_COMPILER_IS_GNUCXX)
       "${CMAKE_CXX_FLAGS} -std=c++0x")
   endif(CYGWIN)
   set(CMAKE_CXX_FLAGS
-    "${CMAKE_CXX_FLAGS} -Wall -pedantic -Werror -Wextra -Werror=shadow")
+    "${CMAKE_CXX_FLAGS} -Wall -pedantic -Wextra -Werror=shadow")
   set(FLATBUFFERS_PRIVATE_CXX_FLAGS "-Wold-style-cast")
   if (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 4.4)
     if (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 7.0)