diff --git a/bad_alloc.cc b/bad_alloc.cc
--- a/bad_alloc.cc
+++ b/bad_alloc.cc
@@ -8,6 +8,7 @@
 #include <exception>
 #include <sys/time.h>
 #include <sys/resource.h>
+#include <cstdlib>
 
 using namespace std;