diff --git a/include/cantera/base/FactoryBase.h b/include/cantera/base/FactoryBase.h
index 1a2ba656d..e4f2c1593 100644
--- a/include/cantera/base/FactoryBase.h
+++ b/include/cantera/base/FactoryBase.h
@@ -12,6 +12,7 @@
 #include <vector>
 #include <mutex>
 #include <unordered_map>
+#include <functional>
 #include "cantera/base/ctexceptions.h"
 #include "cantera/base/global.h"