diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3bfe611373d46141a1a356cdcb625e8768be7d8e..6623a8cedf9cbf687712a197ebded6f619d2b3b8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -26,12 +26,6 @@ message(STATUS "Configured to compile in ${CMAKE_BUILD_TYPE} mode.")
 SET(CMAKE_CXX_FLAGS_DEBUG "-g -Wall -D_REENTRANT")
 SET(CMAKE_CXX_FLAGS_RELEASE "-O3 -D_REENTRANT")
 
-if(UNIX)
-  # GCC is not strict enough by default, so enable most of the warnings.
-  set(CMAKE_CXX_FLAGS
-    "${CMAKE_CXX_FLAGS} -Werror=all -Werror=extra -Wno-unknown-pragmas -Wno-sign-compare -Wno-unused-parameter -Wno-missing-field-initializers")
-endif(UNIX)
-
 #Set compiler according C++11 support
 include(CheckCXXCompilerFlag)
 CHECK_CXX_COMPILER_FLAG("-std=c++11" COMPILER_SUPPORTS_CXX11)
@@ -46,6 +40,12 @@ else()
         message(STATUS "The compiler ${CMAKE_CXX_COMPILER} has no C++11 support. Please use a different C++ compiler.")
 endif()
 
+if(UNIX)
+  # GCC is not strict enough by default, so enable most of the warnings.
+  set(CMAKE_CXX_FLAGS
+    "${CMAKE_CXX_FLAGS} -Werror=all -Werror=extra -Wno-unknown-pragmas -Wno-sign-compare -Wno-unused-parameter -Wno-missing-field-initializers")
+endif(UNIX)
+
 
 #OPTION(BUILD_DOC "Build Documentation" OFF)
 OPTION(BUILD_TESTS "Build Unit tests" ON)