diff --git a/apps/openmw/mwinput/controlswitch.hpp b/apps/openmw/mwinput/controlswitch.hpp
index 3ca989e2a..38d01066b 100644
--- a/apps/openmw/mwinput/controlswitch.hpp
+++ b/apps/openmw/mwinput/controlswitch.hpp
@@ -2,6 +2,7 @@
 #define MWINPUT_CONTROLSWITCH_H
 
 #include <map>
+#include <string>
 
 namespace ESM
 {