diff --git a/src/frontends/controllers/ControlCredits.h b/src/frontends/controllers/ControlCredits.h
index e7e73f431d..cdb08d2f68 100644
--- a/src/frontends/controllers/ControlCredits.h
+++ b/src/frontends/controllers/ControlCredits.h
@@ -10,6 +10,8 @@
 #ifndef CONTROLCREDITS_H
 #define CONTROLCREDITS_H
 
+#include "Lsstream.h"
+
 #ifdef __GNUG__
 #pragma interface
 #endif