Index: Pctest.h
--- Pctest.h.orig
+++ Pctest.h
@@ -86,7 +86,7 @@ class Pctest {
     virtual char *GetPrintableAddress() = 0;
     virtual char *GetPrintableAddress(void *a) = 0;
     virtual char *GetName(void *a) = 0;
-    virtual char *GetAddressFamilyString() = 0;
+    virtual const char *GetAddressFamilyString() = 0;
     virtual int GetAddressFamily() = 0;
 
     // Get input and output sockets needed