1 files changed, 0 insertions, 1 deletions
diff --git a/src/etc.c b/src/etc.c
index 626627f6f..5d2c836e7 100644
--- a/src/etc.c
+++ b/src/etc.c
@@ -170,7 +170,6 @@ mrb_obj_id(mrb_value obj)
   case  MRB_TT_ARRAY:
   case  MRB_TT_HASH:
   case  MRB_TT_RANGE:
-  case  MRB_TT_STRUCT:
   case  MRB_TT_EXCEPTION:
   case  MRB_TT_FILE:
   case  MRB_TT_DATA: