--- C:/Users/jofa/AppData/Local/Temp/map.hpp-rev79766.svn004.tmp.hpp	Fr Dez 30 11:16:31 2011
+++ C:/cygwin/home/jofa/dev/boost/branches/release/boost/icl/map.hpp	Mo Jul 23 17:19:26 2012
@@ -192,7 +192,7 @@
         insert(key_value_pair); 
     }
 
-    map& operator = (map& src) 
+    map& operator = (const map& src) 
     { 
         base_type::operator=(src);
         return *this;