1 files changed, 2 insertions, 0 deletions
diff --git a/variable.c b/variable.c
index 288692ed4d..bdf18b8e4f 100644
--- a/variable.c
+++ b/variable.c
@@ -2248,6 +2248,8 @@ iterate_over_shapes_with_callback(rb_shape_t *shape, rb_ivar_foreach_callback_fu
             }
         }
         return false;
+      default:
+        UNREACHABLE_RETURN(false);
     }
 }