diff --git a/src/zmq.cpp b/src/zmq.cpp
index 6cddc44c..d4480c93 100644
--- a/src/zmq.cpp
+++ b/src/zmq.cpp
@@ -63,6 +63,7 @@ struct iovec {
 #include <string.h>
 #include <stdlib.h>
 #include <new>
+#include <climits>
 
 #include "proxy.hpp"
 #include "socket_base.hpp"