diff --git a/src/commands/CmdCustom.cpp b/src/commands/CmdCustom.cpp
index 8bf82b3ea..964e49553 100644
--- a/src/commands/CmdCustom.cpp
+++ b/src/commands/CmdCustom.cpp
@@ -28,6 +28,7 @@
 #include <sstream>
 #include <map>
 #include <vector>
+#include <algorithm>
 #include <stdlib.h>
 #include <Context.h>
 #include <Filter.h>