diff --git a/src/backend/distributed/sql/udfs/citus_split_shard_by_split_points/11.0-2.sql b/src/backend/distributed/sql/udfs/citus_split_shard_by_split_points/11.0-2.sql
index bce5e9d04..eb2d38f48 100644
--- a/src/backend/distributed/sql/udfs/citus_split_shard_by_split_points/11.0-2.sql
+++ b/src/backend/distributed/sql/udfs/citus_split_shard_by_split_points/11.0-2.sql
@@ -1,3 +1,9 @@
+-- Three modes to be implemented: blocking, non_blocking and auto.
+-- Currently, the default / only supported mode is blocking.
+CREATE TYPE citus.split_mode AS ENUM (
+    'blocking'
+);
+
 CREATE OR REPLACE FUNCTION pg_catalog.citus_split_shard_by_split_points(
     shard_id bigint,
     split_points integer[],
diff --git a/src/backend/distributed/sql/udfs/citus_split_shard_by_split_points/latest.sql b/src/backend/distributed/sql/udfs/citus_split_shard_by_split_points/latest.sql
index bce5e9d04..eb2d38f48 100644
--- a/src/backend/distributed/sql/udfs/citus_split_shard_by_split_points/latest.sql
+++ b/src/backend/distributed/sql/udfs/citus_split_shard_by_split_points/latest.sql
@@ -1,3 +1,9 @@
+-- Three modes to be implemented: blocking, non_blocking and auto.
+-- Currently, the default / only supported mode is blocking.
+CREATE TYPE citus.split_mode AS ENUM (
+    'blocking'
+);
+
 CREATE OR REPLACE FUNCTION pg_catalog.citus_split_shard_by_split_points(
     shard_id bigint,
     split_points integer[],