diff --git a/src/lib/eo/Eo.h b/src/lib/eo/Eo.h
index a163e2abfb..cf10bb3931 100644
--- a/src/lib/eo/Eo.h
+++ b/src/lib/eo/Eo.h
@@ -153,7 +153,7 @@ enum _Eo_Op_Type
  */
 typedef enum _Eo_Op_Type Eo_Op_Type;
 
-/** XXX: Hack until fixed in Eolian */
+/** This has to be duplicated here because Eolian doesn't support event callbacks. */
 typedef struct _Eo_Event Eo_Event;
 /**
  * @typedef Eo_Event_Cb
diff --git a/src/lib/eo/eo_base.eo b/src/lib/eo/eo_base.eo
index 2dfd6abc99..8a31a35233 100644
--- a/src/lib/eo/eo_base.eo
+++ b/src/lib/eo/eo_base.eo
@@ -1,6 +1,6 @@
 import eina_types;
 
-/* XXX: Hack until Eolian is ready. */
+/* Event callbacks are a special case and have to be external as eolian doesn't support function pointers. */
 type @extern Eo.Event_Cb: __builtin_event_cb;
 
 struct Eo.Event_Description {