--- tools/libxc/xc_ptrace.c.orig	2005-03-30 14:30:15.000000000 -0600
+++ tools/libxc/xc_ptrace.c	2005-03-30 14:33:13.000000000 -0600
@@ -238,7 +238,7 @@ xc_ptrace(enum __ptrace_request request,
     xc_domaininfo_t info;
     struct gdb_regs pt;
     long retval = 0;
-    long *guest_va;
+    unsigned long *guest_va;
 
     op.interface_version = DOM0_INTERFACE_VERSION;