diff --git a/src/servers/debug/DebugWindow.cpp b/src/servers/debug/DebugWindow.cpp
index a8b7a78be2..5c66a40a94 100644
--- a/src/servers/debug/DebugWindow.cpp
+++ b/src/servers/debug/DebugWindow.cpp
@@ -6,6 +6,7 @@
 
 #include "DebugWindow.h"
 
+#include <algorithm>
 #include <stdio.h>
 
 #include <Button.h>