diff --git a/include/boost/python/object/function.hpp b/include/boost/python/object/function.hpp
index c239b6e6..2a05a946 100644
--- a/include/boost/python/object/function.hpp
+++ b/include/boost/python/object/function.hpp
@@ -31,7 +31,7 @@ struct BOOST_PYTHON_DECL function : PyObject
     
  private: // helper functions
     void argument_error(PyObject* args, PyObject* keywords) const;
-    void add_overload(function* overload);
+    void add_overload(function*);
     
  private: // data members
     py_function m_fn;
diff --git a/src/object/function.cpp b/src/object/function.cpp
index 7878fa47..a30e9f15 100644
--- a/src/object/function.cpp
+++ b/src/object/function.cpp
@@ -63,9 +63,9 @@ void function::argument_error(PyObject* args, PyObject* keywords) const
     PyErr_BadArgument();
 }
 
-void function::add_overload(function* overload)
+void function::add_overload(function* overload_)
 {
-    Py_XINCREF(overload);
+    Py_XINCREF(overload_);
     
     function* parent = this;
     
@@ -73,7 +73,7 @@ void function::add_overload(function* overload)
     {
         parent = parent->m_overloads;
     }
-    parent->m_overloads = overload;
+    parent->m_overloads = overload_;
 }
 
 void function::add_to_namespace(