diff --git a/src/external/muparser_v132/src/muParserBytecode.cpp b/src/external/muparser_v132/src/muParserBytecode.cpp
index cbb341a67..82b3c80b5 100644
--- a/src/external/muparser_v132/src/muParserBytecode.cpp
+++ b/src/external/muparser_v132/src/muParserBytecode.cpp
@@ -30,6 +30,7 @@
 #include <stack>
 #include <vector>
 #include <iostream>
+#include <algorithm>
 
 #include "muParserDef.h"
 #include "muParserError.h"