$NetBSD$

--- main/sparse/make_sparse.cc.orig	2006-10-20 12:58:09.000000000 +0200
+++ main/sparse/make_sparse.cc	2006-10-20 12:58:23.000000000 +0200
@@ -321,7 +321,7 @@
                // if args(5) is not string, then ignore the value
                // otherwise check for summation or unique
                if ( args(5).is_string()) {
-                  string vv= args(5).string_value();
+                  std::string vv= args(5).string_value();
 		  if (error_state) return retval;
 
                   if ( vv== "summation" ||
