diff --git a/machines/machinefactory.cpp b/machines/machinefactory.cpp
index e26ae9b..da97518 100644
--- a/machines/machinefactory.cpp
+++ b/machines/machinefactory.cpp
@@ -33,6 +33,7 @@ along with this program. If not, see .
#include
#include
#include
+#include
#include