diff --git a/ipaacasoa/cpp/include/ipaaca-soa/categories_components_lexicon.h b/ipaacasoa/cpp/include/ipaaca-soa/categories_components_lexicon.h
index 333e9c3e43fc501d31937930fa381090ad3eddcf..91d15de4589e199ae5693ccf08a955e8003a0394 100644
--- a/ipaacasoa/cpp/include/ipaaca-soa/categories_components_lexicon.h
+++ b/ipaacasoa/cpp/include/ipaaca-soa/categories_components_lexicon.h
@@ -62,6 +62,9 @@ const std::string CAT__GUI_DATA = "guidata";
 const std::string CAT__SCH3_GESTURE = "sch3gesture";
 const std::string CAT__SCH3_OPTIONS = "sch3options";
 
+/// Ogre/Qt GuiController (relay key events, configure that)
+const std::string CAT__OGRE_GUI_CONTROLLER = "ogreguicontroller";
+
 
 //
 // UNDOCUMENTED CATEGORIES