diff --git a/src/libratbag.h b/src/libratbag.h
index 7fb0383b..f8876ff1 100644
--- a/src/libratbag.h
+++ b/src/libratbag.h
@@ -506,20 +506,6 @@ ratbag_button_get_type(struct ratbag_button *button);
 int
 ratbag_button_set_type(struct ratbag_button *button, enum ratbag_button_type type);
 
-/**
- * @ingroup device
- *
- * Return the identifier of the physical button, if stored in the hardware.
- *
- * FIXME: does this even exist? this function is only here because I though
- * of get_type second :)
- * FIXME: do we need to handle UTF8 here?
- *
- * @return The identifier of the button.
- */
-const char *
-ratbag_button_get_identifier(struct ratbag_button *button);
-
 /**
  * @ingroup device
  *