diff --git a/retroshare-gui/src/gui/msgs/MessageComposer.h b/retroshare-gui/src/gui/msgs/MessageComposer.h
index 2666da86d..df8b3c40d 100644
--- a/retroshare-gui/src/gui/msgs/MessageComposer.h
+++ b/retroshare-gui/src/gui/msgs/MessageComposer.h
@@ -30,7 +30,7 @@
 #include "gui/msgs/MessageInterface.h"
 
 class QAction;
-class RsIdentityDetails;
+struct RsIdentityDetails;
 class QComboBox;
 class QFontComboBox;
 class QTextEdit;