diff --git a/rogueviz/grigorchuk.cpp b/rogueviz/grigorchuk.cpp
index f57a2f09..a5a030f6 100644
--- a/rogueviz/grigorchuk.cpp
+++ b/rogueviz/grigorchuk.cpp
@@ -448,7 +448,6 @@ void create_grigorchuk_geometry() {
   gi.quotient_name = "Grigorchuk";
   gi.menu_displayed_name = "Grigorchuk group";
   gi.shortname = "Grig";
-  gi.xcode = 0x31400;
   gi.default_variation = eVariation::pure;
   }
 
diff --git a/rogueviz/janko.cpp b/rogueviz/janko.cpp
index 1628dff5..5bcf64f0 100644
--- a/rogueviz/janko.cpp
+++ b/rogueviz/janko.cpp
@@ -129,7 +129,6 @@ void create_janko() {
   gi.flags = qANYQ | qBOUNDED | qEXPERIMENTAL;
   gi.quotient_name = "Janko";
   gi.shortname = "Janko";
-  gi.xcode = 0x31400;
   gi.menu_displayed_name = "Janko group J1";
   }