diff --git a/src/main.cpp b/src/main.cpp
index b639d34..ae7bd39 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -2,6 +2,7 @@
 #include <ptypes/pasync.h>
 #include <ptypes/pinet.h>
 #include <ptypes/ptime.h>
+#include <cstdlib>
 
 USING_PTYPES;