diff --git a/src/lib/elementary/elm_multibuttonentry.eo b/src/lib/elementary/elm_multibuttonentry.eo
index 08b2113deb..0db01233d9 100644
--- a/src/lib/elementary/elm_multibuttonentry.eo
+++ b/src/lib/elementary/elm_multibuttonentry.eo
@@ -1,3 +1,6 @@
+type Elm_Multibuttonentry_Item_Filter_Cb: __undefined_type;
+type Elm_Multibuttonentry_Format_Cb: __undefined_type;
+
 class Elm.Multibuttonentry (Elm.Layout)
 {
    eo_prefix: elm_obj_multibuttonentry;