diff --git a/indra/linux_updater/linux_updater.cpp b/indra/linux_updater/linux_updater.cpp
index 86fa596aef6d98d0eb982aed22a796e64376c88f..9229520f835aeaccca09a0bbd3bf33b20c00cd99 100644
--- a/indra/linux_updater/linux_updater.cpp
+++ b/indra/linux_updater/linux_updater.cpp
@@ -28,6 +28,7 @@
 #include <unistd.h>
 #include <signal.h>
 #include <errno.h>
+#include <set>
 
 #include "linden_common.h"
 #include "llerrorcontrol.h"