diff --git a/CMakeLists.txt b/CMakeLists.txt
index f11bbb52..755b8b72 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -15,7 +15,7 @@ if (CMAKE_VERSION VERSION_LESS "3.1")
 else()
   set(CMAKE_CXX_STANDARD 11)
   set(CMAKE_CXX_STANDARD_REQUIRED ON)
-  if(NOT CYGWIN)
+  if(NOT CYGWIN AND NOT MSYS)
     set(CMAKE_CXX_EXTENSIONS OFF)
   endif()
 endif()