diff --git a/src/backend/optimizer/plan/planner.c b/src/backend/optimizer/plan/planner.c
index 55a35aa3397..9458efab480 100644
--- a/src/backend/optimizer/plan/planner.c
+++ b/src/backend/optimizer/plan/planner.c
@@ -7976,6 +7976,12 @@ create_partial_grouping_paths(PlannerInfo *root,
 										 extra);
 	}
 
+	/* Let extensions possibly add some more partial paths */
+	if (create_upper_paths_hook)
+		(*create_upper_paths_hook) (root, UPPERREL_PARTIAL_GROUP_AGG,
+									input_rel, partially_grouped_rel,
+									extra);
+
 	return partially_grouped_rel;
 }