diff --git a/contrib/test_decoding/expected/repack.out b/contrib/test_decoding/expected/repack.out
index ce2cadfa222..2dd3891b869 100644
--- a/contrib/test_decoding/expected/repack.out
+++ b/contrib/test_decoding/expected/repack.out
@@ -87,6 +87,12 @@ REPACK (CONCURRENTLY) repack_conc_unlogged;
 ERROR:  cannot execute REPACK (CONCURRENTLY) on relation "repack_conc_unlogged"
 HINT:  REPACK (CONCURRENTLY) is only allowed for permanent relations.
 DROP TABLE repack_conc_unlogged;
+-- Doesn't support materialized views
+CREATE MATERIALIZED VIEW repack_conc_matview AS SELECT 1 AS i;
+REPACK (CONCURRENTLY) repack_conc_matview;
+ERROR:  cannot execute REPACK (CONCURRENTLY) on relation "repack_conc_matview"
+DETAIL:  This operation is not supported for materialized views.
+DROP MATERIALIZED VIEW repack_conc_matview;
 -- Doesn't support tables with REPLICA IDENTITY NOTHING, even if they have a primary key
 CREATE TABLE repack_conc_replident (i int PRIMARY KEY);
 ALTER TABLE repack_conc_replident REPLICA IDENTITY NOTHING;
diff --git a/contrib/test_decoding/sql/repack.sql b/contrib/test_decoding/sql/repack.sql
index eb891009baf..e995c72d28d 100644
--- a/contrib/test_decoding/sql/repack.sql
+++ b/contrib/test_decoding/sql/repack.sql
@@ -64,6 +64,11 @@ CREATE UNLOGGED TABLE repack_conc_unlogged (i int PRIMARY KEY);
 REPACK (CONCURRENTLY) repack_conc_unlogged;
 DROP TABLE repack_conc_unlogged;
 
+-- Doesn't support materialized views
+CREATE MATERIALIZED VIEW repack_conc_matview AS SELECT 1 AS i;
+REPACK (CONCURRENTLY) repack_conc_matview;
+DROP MATERIALIZED VIEW repack_conc_matview;
+
 -- Doesn't support tables with REPLICA IDENTITY NOTHING, even if they have a primary key
 CREATE TABLE repack_conc_replident (i int PRIMARY KEY);
 ALTER TABLE repack_conc_replident REPLICA IDENTITY NOTHING;
diff --git a/doc/src/sgml/ref/repack.sgml b/doc/src/sgml/ref/repack.sgml
index f9fc45b9575..20426cda4ca 100644
--- a/doc/src/sgml/ref/repack.sgml
+++ b/doc/src/sgml/ref/repack.sgml
@@ -261,6 +261,12 @@ REPACK [ ( <replaceable class="parameter">option</replaceable> [, ...] ) ] USING
       following cases:
 
       <itemizedlist>
+       <listitem>
+        <para>
+          The relation is not a table (e.g., it is a materialized view).
+        </para>
+       </listitem>
+
        <listitem>
         <para>
           The table is <literal>UNLOGGED</literal>.
diff --git a/src/backend/commands/repack.c b/src/backend/commands/repack.c
index 57f28f1a420..4521ccd036f 100644
--- a/src/backend/commands/repack.c
+++ b/src/backend/commands/repack.c
@@ -945,6 +945,14 @@ check_concurrent_repack_requirements(Relation rel, Oid *ident_idx_p)
 				errhint("%s is only allowed for permanent relations.",
 						"REPACK (CONCURRENTLY)"));
 
+	/* A materialized view produces no logically decoded changes. */
+	if (rel->rd_rel->relkind == RELKIND_MATVIEW)
+		ereport(ERROR,
+				errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
+				errmsg("cannot execute %s on relation \"%s\"",
+					   "REPACK (CONCURRENTLY)", RelationGetRelationName(rel)),
+				errdetail_relkind_not_supported(rel->rd_rel->relkind));
+
 	/*
 	 * With NOTHING, WAL does not contain the old tuple; FULL is not yet
 	 * supported.