--- boost/ptr_container/ptr_map_adapter.hpp.orig	2008-10-09 03:16:01.000000000 -0400
+++ boost/ptr_container/ptr_map_adapter.hpp	2008-10-09 03:17:49.000000000 -0400
@@ -545,7 +545,7 @@
         
     public:
         
-        std::pair<iterator,bool> insert( key_type& key, mapped_type x )
+        std::pair<iterator,bool> insert( const key_type& key, mapped_type x )
         {
             return insert_impl( key, x );
         }
@@ -794,7 +794,7 @@
             insert( boost::begin(r), boost::end(r) );
         }
 
-        iterator insert( key_type& key, mapped_type x ) // strong
+        iterator insert( const key_type& key, mapped_type x ) // strong
         {
             return insert_impl( key, x );
         }