diff --git a/src/utility/filteredStream.cpp b/src/utility/filteredStream.cpp
index 9586f165..d55e891e 100644
--- a/src/utility/filteredStream.cpp
+++ b/src/utility/filteredStream.cpp
@@ -19,6 +19,7 @@
 
 #include "vmime/utility/filteredStream.hpp"
 
+#include <algorithm>
 
 namespace vmime {
 namespace utility {