diff --git a/mie/dialect/builtin/builtin.c b/mie/dialect/builtin/builtin.c
index afba27c..0141ebd 100644
--- a/mie/dialect/builtin/builtin.c
+++ b/mie/dialect/builtin/builtin.c
@@ -84,17 +84,17 @@ struct mie_attribute *mie_ctx_get_index(struct mie_ctx *ctx, size_t val)
 MIE_DIALECT_BEGIN(mie_builtin, struct builtin_dialect, "builtin")
 	MIE_DIALECT_INIT(init);
 	MIE_DIALECT_CLEANUP(cleanup);
-	MIE_DIALECT_ADD_OP(mie_builtin_module);
-	MIE_DIALECT_ADD_TYPE(mie_builtin_string);
+	MIE_DIALECT_ADD_TRAIT(mie_builtin_isolated_from_above);
+	MIE_DIALECT_ADD_TRAIT(mie_builtin_symbol_table);
 	MIE_DIALECT_ADD_TYPE(mie_builtin_int);
 	MIE_DIALECT_ADD_TYPE(mie_builtin_float);
 	MIE_DIALECT_ADD_TYPE(mie_builtin_index);
-	MIE_DIALECT_ADD_ATTRIBUTE(mie_builtin_string);
+	MIE_DIALECT_ADD_TYPE(mie_builtin_string);
 	MIE_DIALECT_ADD_ATTRIBUTE(mie_builtin_int);
 	MIE_DIALECT_ADD_ATTRIBUTE(mie_builtin_float);
-	MIE_DIALECT_ADD_ATTRIBUTE(mie_builtin_array);
 	MIE_DIALECT_ADD_ATTRIBUTE(mie_builtin_type);
-	MIE_DIALECT_ADD_TRAIT(mie_builtin_isolated_from_above);
-	MIE_DIALECT_ADD_TRAIT(mie_builtin_symbol_table);
+	MIE_DIALECT_ADD_ATTRIBUTE(mie_builtin_string);
 	MIE_DIALECT_ADD_INTERFACE(mie_builtin_symbol);
+	MIE_DIALECT_ADD_ATTRIBUTE(mie_builtin_array);
+	MIE_DIALECT_ADD_OP(mie_builtin_module);
 MIE_DIALECT_END()
diff --git a/mie/dialect/builtin/op/module.c b/mie/dialect/builtin/op/module.c
index 6d449ce..5dd9481 100644
--- a/mie/dialect/builtin/op/module.c
+++ b/mie/dialect/builtin/op/module.c
@@ -1,3 +1,4 @@
+#include <mie/ctx.h>
 #include <mie/dialect/dialect.h>
 #include <mie/ir/op-definition.h>
 #include <mie/ir/op.h>
@@ -26,4 +27,5 @@ static enum mie_status parse(struct mie_parser *parser, struct mie_op *out)
 MIE_OP_DEFINITION_BEGIN(mie_builtin_module, "module")
 	MIE_OP_DEFINITION_PRINT(print);
 	MIE_OP_DEFINITION_PARSE(parse);
+	MIE_OP_DEFINITION_TRAIT("builtin", "isolated-from-above");
 MIE_OP_DEFINITION_END()