diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7aa6637df..f7ea1949b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -22,7 +22,7 @@ pkg_search_module(GLFW REQUIRED glfw3)
 
 IF (APPLE)
     FIND_LIBRARY(COREFOUNDATION_LIBRARY CoreFoundation)
-	SET(CMAKE_CXX_FLAGS "-stdlib=libc++")
+    SET(CMAKE_CXX_FLAGS "-stdlib=libc++")
 	SET(CMAKE_EXE_LINKER_FLAGS "-stdlib=libc++")
 ENDIF (APPLE)