diff --git a/src/backend/commands/tablecmds.c b/src/backend/commands/tablecmds.c
index 81c38450954..f4745f3a9a4 100644
--- a/src/backend/commands/tablecmds.c
+++ b/src/backend/commands/tablecmds.c
@@ -13223,21 +13223,6 @@ transformPartitionSpec(Relation rel, PartitionSpec *partspec, char *strategy)
 	foreach(l, partspec->partParams)
 	{
 		PartitionElem *pelem = castNode(PartitionElem, lfirst(l));
-		ListCell   *lc;
-
-		/* Check for PARTITION BY ... (foo, foo) */
-		foreach(lc, newspec->partParams)
-		{
-			PartitionElem *pparam = castNode(PartitionElem, lfirst(lc));
-
-			if (pelem->name && pparam->name &&
-				strcmp(pelem->name, pparam->name) == 0)
-				ereport(ERROR,
-						(errcode(ERRCODE_DUPLICATE_COLUMN),
-						 errmsg("column \"%s\" appears more than once in partition key",
-								pelem->name),
-						 parser_errposition(pstate, pelem->location)));
-		}
 
 		if (pelem->expr)
 		{
diff --git a/src/test/regress/expected/create_table.out b/src/test/regress/expected/create_table.out
index 0026aa11dd4..660398bdbe0 100644
--- a/src/test/regress/expected/create_table.out
+++ b/src/test/regress/expected/create_table.out
@@ -305,11 +305,6 @@ CREATE TABLE partitioned (
 ERROR:  exclusion constraints are not supported on partitioned tables
 LINE 3:  EXCLUDE USING gist (a WITH &&)
          ^
--- prevent column from being used twice in the partition key
-CREATE TABLE partitioned (
-	a int
-) PARTITION BY RANGE (a, a);
-ERROR:  column "a" appears more than once in partition key
 -- prevent using prohibited expressions in the key
 CREATE FUNCTION retset (a int) RETURNS SETOF int AS $$ SELECT 1; $$ LANGUAGE SQL IMMUTABLE;
 CREATE TABLE partitioned (
diff --git a/src/test/regress/sql/create_table.sql b/src/test/regress/sql/create_table.sql
index ad836141379..16f2edb897b 100644
--- a/src/test/regress/sql/create_table.sql
+++ b/src/test/regress/sql/create_table.sql
@@ -315,11 +315,6 @@ CREATE TABLE partitioned (
 	EXCLUDE USING gist (a WITH &&)
 ) PARTITION BY RANGE (a);
 
--- prevent column from being used twice in the partition key
-CREATE TABLE partitioned (
-	a int
-) PARTITION BY RANGE (a, a);
-
 -- prevent using prohibited expressions in the key
 CREATE FUNCTION retset (a int) RETURNS SETOF int AS $$ SELECT 1; $$ LANGUAGE SQL IMMUTABLE;
 CREATE TABLE partitioned (