diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7ce7858f..5fb38506 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -92,20 +92,19 @@ OPTION (MSGPACK_BUILD_EXAMPLES "Build msgpack examples." ON)
 
 IF (MSGPACK_BOOST)
    SET (CMAKE_CXX_FLAGS "-DMSGPACK_USE_BOOST ${CMAKE_CXX_FLAGS}")
-ENDIF ()
-
-SET (Boost_USE_MULTITHREADED      ON)
-SET (Boost_USE_STATIC_RUNTIME    OFF)
-FIND_PACKAGE (Boost COMPONENTS chrono context timer system)
-IF (Boost_INCLUDE_DIRS)
-    INCLUDE_DIRECTORIES (
-        ${Boost_INCLUDE_DIRS}
-    )
-ENDIF ()
-IF (MSGPACK_BOOST_DIR)
-    INCLUDE_DIRECTORIES (
-        ${MSGPACK_BOOST_DIR}
-    )
+   SET (Boost_USE_MULTITHREADED      ON)
+   SET (Boost_USE_STATIC_RUNTIME    OFF)
+   FIND_PACKAGE (Boost COMPONENTS chrono context timer system)
+   IF (Boost_INCLUDE_DIRS)
+      INCLUDE_DIRECTORIES (
+         ${Boost_INCLUDE_DIRS}
+   )
+   ENDIF ()
+   IF (MSGPACK_BOOST_DIR)
+      INCLUDE_DIRECTORIES (
+         ${MSGPACK_BOOST_DIR}
+      )
+   ENDIF ()
 ENDIF ()
 
 IF (MSGPACK_CHAR_SIGN)