diff --git a/CMakeLists.txt b/CMakeLists.txt
index c3c36ff77..ebdb3754b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -5,15 +5,15 @@ project(poac)
 # Preprocessor definitions
 add_definitions(-DPOAC_PROJECT_ROOT="${CMAKE_SOURCE_DIR}")
 add_definitions(-DPOAC_VERSION="0.1.2")
-if(UNIX)
+if(CYGWIN)
+    add_definitions(-D_GNU_SOURCE -DBOOST_ASIO_HAS_STD_STRING_VIEW -Wa,-mbig-obj)
+elseif(UNIX)
     add_definitions("-fdiagnostics-color -Wall -Wextra -Werror")
     if(NOT APPLE)
         add_definitions(-D_GNU_SOURCE -DBOOST_ASIO_HAS_STD_STRING_VIEW)
     endif()
 elseif(WIN32)
-    if(CYGWIN)
-        add_definitions(-D_GNU_SOURCE -DBOOST_ASIO_HAS_STD_STRING_VIEW -Wa, -mbing-obj)
-    elseif(MSVC)
+    if(MSVC)
         set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W4 /MT")
         set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /D_GNU_SOURCE /DBOOST_ASIO_HAS_STD_STRING_VIEW /mbig-obj")
     endif()