diff --git a/src/FaustEngine.cpp b/src/FaustEngine.cpp
index ef37f1e..7c9967c 100644
--- a/src/FaustEngine.cpp
+++ b/src/FaustEngine.cpp
@@ -29,6 +29,8 @@
 
 #include <iostream>
 #include <memory>
+#include <algorithm>
+#include <functional>
 
 using namespace std;