diff --git a/ckanext/datastore/set_permissions.sql b/ckanext/datastore/set_permissions.sql
index e1a8747c95a..54441b4bf85 100644
--- a/ckanext/datastore/set_permissions.sql
+++ b/ckanext/datastore/set_permissions.sql
@@ -63,9 +63,9 @@ CREATE OR REPLACE VIEW "_table_metadata" AS
         LEFT OUTER JOIN pg_class AS dependent ON d.refobjid = dependent.oid
     WHERE
         (dependee.oid != dependent.oid OR dependent.oid IS NULL) AND
-        -- is a table (from pg_tables view definition)
-        -- or is a view (from pg_views view definition)
-        (dependee.relkind = 'r'::"char" OR dependee.relkind = 'v'::"char")
+        -- is a table, view or materialized view
+        (dependee.relkind = 'r'::"char" OR dependee.relkind = 'v'::"char"
+            OR dependee.relkind = 'm'::"char")
         AND dependee.relnamespace = (
             SELECT oid FROM pg_namespace WHERE nspname='public')
     ORDER BY dependee.oid DESC;