diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4f6b0788..282795a7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -27,7 +27,12 @@ message(STATUS "Build spdlog: ${SPDLOG_VERSION}")
 #---------------------------------------------------------------------------------------
 set(CMAKE_CXX_STANDARD 11)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
-set(CMAKE_CXX_EXTENSIONS OFF)
+set(CMAKE_CXX_EXTENSIONS  OFF)
+
+if(CMAKE_SYSTEM_NAME MATCHES "CYGWIN")
+	set(CMAKE_CXX_EXTENSIONS  ON)
+endif()
+
 
 #---------------------------------------------------------------------------------------
 # Set SPDLOG_MASTER_PROJECT to ON if we are building spdlog