diff --git a/shared/src/AgentList.cpp b/shared/src/AgentList.cpp
index 0c0f24ef00..3ff902802c 100644
--- a/shared/src/AgentList.cpp
+++ b/shared/src/AgentList.cpp
@@ -8,6 +8,7 @@
 
 #include <pthread.h>
 #include <cstring>
+#include <stdlib.h>
 #include "AgentList.h"
 #include "SharedUtil.h"