diff --git a/src/backend/parser/parse_agg.c b/src/backend/parser/parse_agg.c
index 4fbf80c271..85cd47b7ae 100644
--- a/src/backend/parser/parse_agg.c
+++ b/src/backend/parser/parse_agg.c
@@ -736,8 +736,7 @@ check_agg_arguments_walker(Node *node,
 				context->min_agglevel > agglevelsup)
 				context->min_agglevel = agglevelsup;
 		}
-		/* no need to examine args of the inner aggregate */
-		return false;
+		/* Continue and descend into subtree */
 	}
 	if (IsA(node, GroupingFunc))
 	{
diff --git a/src/test/regress/expected/aggregates.out b/src/test/regress/expected/aggregates.out
index e074cb71bf..f0517f95b6 100644
--- a/src/test/regress/expected/aggregates.out
+++ b/src/test/regress/expected/aggregates.out
@@ -1282,6 +1282,12 @@ select (select max(min(unique1)) from int8_tbl) from tenk1;
 ERROR:  aggregate function calls cannot be nested
 LINE 1: select (select max(min(unique1)) from int8_tbl) from tenk1;
                            ^
+select avg((select avg(a1.col1 order by (select avg(a2.col2) from tenk1 a3))
+            from tenk1 a1(col1)))
+from tenk1 a2(col2);
+ERROR:  aggregate function calls cannot be nested
+LINE 1: select avg((select avg(a1.col1 order by (select avg(a2.col2)...
+                                                        ^
 --
 -- Test removal of redundant GROUP BY columns
 --
diff --git a/src/test/regress/sql/aggregates.sql b/src/test/regress/sql/aggregates.sql
index 616ef38c25..1783d19bd5 100644
--- a/src/test/regress/sql/aggregates.sql
+++ b/src/test/regress/sql/aggregates.sql
@@ -439,6 +439,9 @@ drop table minmaxtest cascade;
 -- check for correct detection of nested-aggregate errors
 select max(min(unique1)) from tenk1;
 select (select max(min(unique1)) from int8_tbl) from tenk1;
+select avg((select avg(a1.col1 order by (select avg(a2.col2) from tenk1 a3))
+            from tenk1 a1(col1)))
+from tenk1 a2(col2);
 
 --
 -- Test removal of redundant GROUP BY columns