diff --git a/include/chaiscript/dispatchkit/function_call.hpp b/include/chaiscript/dispatchkit/function_call.hpp
index 434d3db1..9dea81cf 100644
--- a/include/chaiscript/dispatchkit/function_call.hpp
+++ b/include/chaiscript/dispatchkit/function_call.hpp
@@ -4,8 +4,8 @@
 // and Jason Turner (jason@emptycrate.com)
 // http://www.chaiscript.com
 
-#ifndef __function_call_hpp__
-#define __function_call_hpp__
+#ifndef CHAISCRIPT_FUNCTION_CALL_HPP_
+#define CHAISCRIPT_FUNCTION_CALL_HPP_
 
 #include <boost/shared_ptr.hpp>
 #include <boost/bind.hpp>
diff --git a/include/chaiscript/utility/utility.hpp b/include/chaiscript/utility/utility.hpp
index 7409acba..27489302 100644
--- a/include/chaiscript/utility/utility.hpp
+++ b/include/chaiscript/utility/utility.hpp
@@ -4,8 +4,8 @@
 // and Jason Turner (jason@emptycrate.com)
 // http://www.chaiscript.com
 
-#ifndef CHAISCRIPT_UTILITY_UTILITY_HPP__
-#define CHAISCRIPT_UTILITY_UTILITY_HPP__
+#ifndef CHAISCRIPT_UTILITY_UTILITY_HPP_
+#define CHAISCRIPT_UTILITY_UTILITY_HPP_
 
 #include "../chaiscript.hpp"
 #include <boost/preprocessor.hpp>