diff --git a/src/Base/Tools2D.h b/src/Base/Tools2D.h
index d27fbee302..b61a8981cf 100644
--- a/src/Base/Tools2D.h
+++ b/src/Base/Tools2D.h
@@ -25,6 +25,7 @@
 #define BASE_TOOLS2D_H
 
 
+#include <algorithm>
 #include <cmath>
 #include <stdio.h>
 #include <list>