diff --git a/include/boost/lambda/detail/operator_lambda_functor_base.hpp b/include/boost/lambda/detail/operator_lambda_func_base.hpp
similarity index 98%
rename from include/boost/lambda/detail/operator_lambda_functor_base.hpp
rename to include/boost/lambda/detail/operator_lambda_func_base.hpp
index 30da2f9..190733a 100644
--- a/include/boost/lambda/detail/operator_lambda_functor_base.hpp
+++ b/include/boost/lambda/detail/operator_lambda_func_base.hpp
@@ -1,4 +1,4 @@
-// Boost Lambda Library  - operator_lambda_functor_base.hpp -----------------
+// Boost Lambda Library  - operator_lambda_func_base.hpp -----------------
 //
 // Copyright (C) 1999, 2000 Jaakko Järvi (jaakko.jarvi@cs.utu.fi)
 //
@@ -15,8 +15,8 @@
 
 // ------------------------------------------------------------
 
-#ifndef BOOST_LAMBDA_OPERATOR_LAMBDA_FUNCTOR_BASE_HPP
-#define BOOST_LAMBDA_OPERATOR_LAMBDA_FUNCTOR_BASE_HPP
+#ifndef BOOST_LAMBDA_OPERATOR_LAMBDA_FUNC_BASE_HPP
+#define BOOST_LAMBDA_OPERATOR_LAMBDA_FUNC_BASE_HPP
 
 namespace boost { 
 namespace lambda {
diff --git a/include/boost/lambda/lambda.hpp b/include/boost/lambda/lambda.hpp
index 3bae771..1676b90 100644
--- a/include/boost/lambda/lambda.hpp
+++ b/include/boost/lambda/lambda.hpp
@@ -24,7 +24,7 @@
 #endif
 
 #include "boost/lambda/detail/operator_actions.hpp"
-#include "boost/lambda/detail/operator_lambda_functor_base.hpp"
+#include "boost/lambda/detail/operator_lambda_func_base.hpp"
 #include "boost/lambda/detail/operator_return_type_traits.hpp"