--- stack/stack.h	2002/03/09 09:58:31	1.6
+++ stack/stack.h	2002/03/10 08:51:31	1.7
@@ -92,6 +92,7 @@
 symbol **hash(hashtbl, const char*);
 value* new_val(environment*);
 void gc_mark(value*);
+void gc_maybe(environment *env);
 extern void gc_init(environment*);
 void push_val(environment*, value*);
 void push_int(environment*, int);