1 files changed, 1 insertions, 1 deletions
diff --git a/shape.c b/shape.c
index d98e596eb1..919ae7c433 100644
--- a/shape.c
+++ b/shape.c
@@ -665,7 +665,7 @@ Init_shape(void)
     rb_define_const(rb_cShape, "SHAPE_T_OBJECT", INT2NUM(SHAPE_T_OBJECT));
     rb_define_const(rb_cShape, "SHAPE_IVAR_UNDEF", INT2NUM(SHAPE_IVAR_UNDEF));
     rb_define_const(rb_cShape, "SHAPE_FROZEN", INT2NUM(SHAPE_FROZEN));
-    rb_define_const(rb_cShape, "SHAPE_BITS", INT2NUM(SHAPE_BITS));
+    rb_define_const(rb_cShape, "SHAPE_ID_NUM_BITS", INT2NUM(SHAPE_ID_NUM_BITS));
     rb_define_const(rb_cShape, "SHAPE_FLAG_SHIFT", INT2NUM(SHAPE_FLAG_SHIFT));
     rb_define_const(rb_cShape, "SPECIAL_CONST_SHAPE_ID", INT2NUM(SPECIAL_CONST_SHAPE_ID));