diff --git a/CMakeLists.txt b/CMakeLists.txt
index 87c3fabd4..3c3cd9f6b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -133,16 +133,10 @@ endif()
 # Platform specific
 if (WIN32)
     set(Boost_USE_STATIC_LIBS   ON)
-    set(PLATFORM_INCLUDE_DIR "platform")
     add_definitions(-DBOOST_ALL_NO_LIB)
 
     # Suppress WinMain(), provided by SDL
     add_definitions(-DSDL_MAIN_HANDLED)
-else (WIN32)
-    set(PLATFORM_INCLUDE_DIR "")
-endif (WIN32)
-if (MSVC10)
-    set(PLATFORM_INCLUDE_DIR "")
 endif()
 
 # Dependencies