diff --git a/CMakeLists.txt b/CMakeLists.txt
index cfb84bae4..a72b62715 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -97,7 +97,7 @@ set(FlatBuffers_GRPCTest_SRCS
 
 if(APPLE)
   set(CMAKE_CXX_FLAGS
-    "${CMAKE_CXX_FLAGS} -std=c++11 -stdlib=libc++ -Wall -pedantic -Werror
+    "${CMAKE_CXX_FLAGS} -std=c++11 -stdlib=libc++ -Wall -pedantic -Werror \
                         -Wextra")
 elseif(CMAKE_COMPILER_IS_GNUCXX)
   if(CYGWIN)
@@ -121,7 +121,7 @@ elseif(CMAKE_COMPILER_IS_GNUCXX)
 
 elseif("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
   set(CMAKE_CXX_FLAGS
-      "${CMAKE_CXX_FLAGS} -std=c++0x -stdlib=libc++ -Wall -pedantic -Werror
+      "${CMAKE_CXX_FLAGS} -std=c++0x -stdlib=libc++ -Wall -pedantic -Werror \
                           -Wextra")
   if(NOT "${CMAKE_SYSTEM_NAME}" MATCHES "FreeBSD")
     set(CMAKE_EXE_LINKER_FLAGS