diff -Naur libsigc++-2.1.1-orig/tests/test_copy_invalid_slot.cc libsigc++-2.1.1/tests/test_copy_invalid_slot.cc
--- libsigc++-2.1.1-orig/tests/test_copy_invalid_slot.cc	2007-08-14 02:03:31.000000000 -0600
+++ libsigc++-2.1.1/tests/test_copy_invalid_slot.cc	2007-12-31 16:43:54.000000000 -0600
@@ -1,4 +1,6 @@
 #include <iostream>
+#include <cstdlib>
+#include <cstring>
 #include <sigc++/sigc++.h>
 
 void Foo(sigc::trackable &t) {}
