diff --git a/retroshare-gui/src/gui/gxschannels/GxsChannelDialog.cpp b/retroshare-gui/src/gui/gxschannels/GxsChannelDialog.cpp
index a35e7a522..8ab57794e 100644
--- a/retroshare-gui/src/gui/gxschannels/GxsChannelDialog.cpp
+++ b/retroshare-gui/src/gui/gxschannels/GxsChannelDialog.cpp
@@ -23,6 +23,7 @@
 #include <QMessageBox>
 
 #include <iostream>
+#include <algorithm>
 
 #include "GxsChannelDialog.h"
 #include "gui/feeds/GxsChannelPostItem.h"