--- src/hash.cc.orig	Sun Feb 27 12:51:56 2000
+++ src/hash.cc	Sun Feb 27 12:53:24 2000
@@ -95,7 +95,7 @@
     return attrs_hash (x, M);
 }
 
-int hash(const char*& s, int M)
+int hash(const char* const& s, int M)
     /* a char* hash function from Aho, Sethi, and Ullman */
 {
     const char *p;