diff --git a/src/backend/catalog/partition.c b/src/backend/catalog/partition.c
index 9a44cceb22..3b5df5164a 100644
--- a/src/backend/catalog/partition.c
+++ b/src/backend/catalog/partition.c
@@ -2531,16 +2531,14 @@ get_partition_for_tuple(Relation relation, Datum *values, bool *isnull)
 
 				/*
 				 * No range includes NULL, so this will be accepted by the
-				 * default partition if there is one, and otherwise
-				 * rejected.
+				 * default partition if there is one, otherwise rejected.
 				 */
 				for (i = 0; i < key->partnatts; i++)
 				{
-					if (isnull[i] &&
-						partition_bound_has_default(partdesc->boundinfo))
+					if (isnull[i])
 					{
 						range_partkey_has_null = true;
-						part_index = partdesc->boundinfo->default_index;
+						break;
 					}
 				}
 
diff --git a/src/test/regress/expected/insert.out b/src/test/regress/expected/insert.out
index 9d84ba4658..a0e3746e70 100644
--- a/src/test/regress/expected/insert.out
+++ b/src/test/regress/expected/insert.out
@@ -642,6 +642,10 @@ create table mcrparted2 partition of mcrparted for values from (10, 6, minvalue)
 create table mcrparted3 partition of mcrparted for values from (11, 1, 1) to (20, 10, 10);
 create table mcrparted4 partition of mcrparted for values from (21, minvalue, minvalue) to (30, 20, maxvalue);
 create table mcrparted5 partition of mcrparted for values from (30, 21, 20) to (maxvalue, maxvalue, maxvalue);
+-- null not allowed in range partition
+insert into mcrparted values (null, null, null);
+ERROR:  no partition of relation "mcrparted" found for row
+DETAIL:  Partition key of the failing row contains (a, abs(b), c) = (null, null, null).
 -- routed to mcrparted0
 insert into mcrparted values (0, 1, 1);
 insert into mcrparted0 values (0, 1, 1);
diff --git a/src/test/regress/sql/insert.sql b/src/test/regress/sql/insert.sql
index 791817ba50..1c4491a6a2 100644
--- a/src/test/regress/sql/insert.sql
+++ b/src/test/regress/sql/insert.sql
@@ -417,6 +417,9 @@ create table mcrparted3 partition of mcrparted for values from (11, 1, 1) to (20
 create table mcrparted4 partition of mcrparted for values from (21, minvalue, minvalue) to (30, 20, maxvalue);
 create table mcrparted5 partition of mcrparted for values from (30, 21, 20) to (maxvalue, maxvalue, maxvalue);
 
+-- null not allowed in range partition
+insert into mcrparted values (null, null, null);
+
 -- routed to mcrparted0
 insert into mcrparted values (0, 1, 1);
 insert into mcrparted0 values (0, 1, 1);