diff --git a/src/mon/Monitor.cc b/src/mon/Monitor.cc
index 1a4d21673bd..e98a3cbe515 100644
--- a/src/mon/Monitor.cc
+++ b/src/mon/Monitor.cc
@@ -16,6 +16,7 @@
 #include <sstream>
 #include <stdlib.h>
 #include <signal.h>
+#include <limits.h>
 
 #include "Monitor.h"
 #include "common/version.h"