diff --git a/src/insets/ExternalTemplate.cpp b/src/insets/ExternalTemplate.cpp
index ae9148b..39a96ae 100644
--- a/src/insets/ExternalTemplate.cpp
+++ b/src/insets/ExternalTemplate.cpp
@@ -22,6 +22,7 @@
 #include "support/PathChanger.h"
 #include "support/Translator.h"
 
+#include <algorithm>
 #include <ostream>
 
 using namespace std;