Upstream-Status: Pending
--- a/apt-pkg/contrib/weakptr.h
+++ b/apt-pkg/contrib/weakptr.h
@@ -21,6 +21,7 @@
#ifndef WEAK_POINTER_H
#define WEAK_POINTER_H
+#include <cstdlib>
#include <set>
/**
* Class for objects providing support for weak pointers.