diff --git a/lib/splitting_tree.cpp b/lib/splitting_tree.cpp
index 2e4cf17..c5c8fdd 100644
--- a/lib/splitting_tree.cpp
+++ b/lib/splitting_tree.cpp
@@ -1,6 +1,7 @@
 #include "splitting_tree.hpp"
 #include "partition.hpp"
 
+#include <algorithm>
 #include <cassert>
 #include <functional>
 #include <numeric>
diff --git a/lib/write_tree_to_dot.cpp b/lib/write_tree_to_dot.cpp
index 717bf51..567a3c5 100644
--- a/lib/write_tree_to_dot.cpp
+++ b/lib/write_tree_to_dot.cpp
@@ -3,6 +3,7 @@
 #include "splitting_tree.hpp"
 #include "write_tree_to_dot.hpp"
 
+#include <algorithm>
 #include <fstream>
 #include <iostream>