diff --git a/lib/repack.c b/lib/repack.c
index 9788371..82e9212 100644
--- a/lib/repack.c
+++ b/lib/repack.c
@@ -663,9 +663,10 @@ repack_get_order_by(PG_FUNCTION_ARGS)
  *
  * repack_indexdef(index, table)
  *
- * @param	index	Oid of target index.
- * @param	table	Oid of table of the index.
+ * @param	index		Oid of target index.
+ * @param	table		Oid of table of the index.
  * @param	tablespace	Namespace for the index. If NULL keep the original.
+ * @param   boolean		Whether to use CONCURRENTLY when creating the index.
  * @retval			Create index DDL for temp table.
  */
 Datum
@@ -690,7 +691,7 @@ repack_indexdef(PG_FUNCTION_ARGS)
 	parse_indexdef(&stmt, index, table);
 
 	initStringInfo(&str);
-	if(concurrent_index)
+	if (concurrent_index)
 		appendStringInfo(&str, "%s CONCURRENTLY index_%u ON %s USING %s (%s)%s",
 			stmt.create, index, stmt.table, stmt.type, stmt.columns, stmt.options);
 	else
diff --git a/regress/expected/tablespace.out b/regress/expected/tablespace.out
index 2a51bc9..3e21219 100644
--- a/regress/expected/tablespace.out
+++ b/regress/expected/tablespace.out
@@ -19,7 +19,7 @@ INSERT INTO testts1 (data) values ('b');
 INSERT INTO testts1 (data) values ('c');
 -- check the indexes definitions
 SELECT regexp_replace(
-    repack.repack_indexdef(indexrelid, 'testts1'::regclass, NULL),
+    repack.repack_indexdef(indexrelid, 'testts1'::regclass, NULL, false),
     '_[0-9]+', '_OID', 'g')
 FROM pg_index i join pg_class c ON c.oid = indexrelid
 WHERE indrelid = 'testts1'::regclass ORDER BY relname;
@@ -31,7 +31,7 @@ WHERE indrelid = 'testts1'::regclass ORDER BY relname;
 (3 rows)
 
 SELECT regexp_replace(
-    repack.repack_indexdef(indexrelid, 'testts1'::regclass, 'foo'),
+    repack.repack_indexdef(indexrelid, 'testts1'::regclass, 'foo', false),
     '_[0-9]+', '_OID', 'g')
 FROM pg_index i join pg_class c ON c.oid = indexrelid
 WHERE indrelid = 'testts1'::regclass ORDER BY relname;
diff --git a/regress/sql/tablespace.sql b/regress/sql/tablespace.sql
index 60b9390..68a2fbd 100644
--- a/regress/sql/tablespace.sql
+++ b/regress/sql/tablespace.sql
@@ -18,13 +18,13 @@ INSERT INTO testts1 (data) values ('c');
 
 -- check the indexes definitions
 SELECT regexp_replace(
-    repack.repack_indexdef(indexrelid, 'testts1'::regclass, NULL),
+    repack.repack_indexdef(indexrelid, 'testts1'::regclass, NULL, false),
     '_[0-9]+', '_OID', 'g')
 FROM pg_index i join pg_class c ON c.oid = indexrelid
 WHERE indrelid = 'testts1'::regclass ORDER BY relname;
 
 SELECT regexp_replace(
-    repack.repack_indexdef(indexrelid, 'testts1'::regclass, 'foo'),
+    repack.repack_indexdef(indexrelid, 'testts1'::regclass, 'foo', false),
     '_[0-9]+', '_OID', 'g')
 FROM pg_index i join pg_class c ON c.oid = indexrelid
 WHERE indrelid = 'testts1'::regclass ORDER BY relname;