diff --git a/basis/db/errors/errors.factor b/basis/db/errors/errors.factor
index 23e88ea940..23dae627ac 100644
--- a/basis/db/errors/errors.factor
+++ b/basis/db/errors/errors.factor
@@ -4,7 +4,7 @@ USING: accessors kernel continuations fry words ;
 IN: db.errors
 
 ERROR: db-error ;
-ERROR: sql-error location ;
+TUPLE: sql-error location ;
 
 ERROR: bad-schema ;
 
diff --git a/basis/db/errors/postgresql/postgresql.factor b/basis/db/errors/postgresql/postgresql.factor
index 3cd0909288..9f64a27873 100644
--- a/basis/db/errors/postgresql/postgresql.factor
+++ b/basis/db/errors/postgresql/postgresql.factor
@@ -34,7 +34,7 @@ PostgresqlSqlError = (TableError | FunctionError | SyntaxError | UnknownError)
 ;EBNF
 
 
-ERROR: parse-postgresql-location column line text ;
+TUPLE: parse-postgresql-location column line text ;
 C: <parse-postgresql-location> parse-postgresql-location
 
 EBNF: parse-postgresql-line-error