diff --git a/CMakeLists.txt b/CMakeLists.txt
index d961d17..1b69f3a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -6,5 +6,8 @@ cmake_minimum_required(VERSION 3.2)
 
 project(Psd)
 
+set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -O3")
+
 add_subdirectory(src/Psd)
 add_subdirectory(src/Samples)
diff --git a/src/Psd/CMakeLists.txt b/src/Psd/CMakeLists.txt
index 44bfbd0..3f8f6f8 100644
--- a/src/Psd/CMakeLists.txt
+++ b/src/Psd/CMakeLists.txt
@@ -36,7 +36,7 @@ set(psd_source_interfaces
 if (WIN32)
   list(APPEND psd_source_interfaces
     PsdNativeFile.h
-    PsdNativeFile.mm
+    PsdNativeFile.cpp
   )
 elseif (APPLE)
   list(APPEND psd_source_interfaces