diff --git a/src/backend/partitioning/partbounds.c b/src/backend/partitioning/partbounds.c
index c9c789297d..d3dedfd784 100644
--- a/src/backend/partitioning/partbounds.c
+++ b/src/backend/partitioning/partbounds.c
@@ -2899,7 +2899,7 @@ check_new_partition_bound(char *relname, Relation parent,
 								ereport(ERROR,
 										(errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
 										 errmsg("every hash partition modulus must be a factor of the next larger modulus"),
-										 errdetail("The new modulus %d is not factor of %d, the modulus of existing partition \"%s\".",
+										 errdetail("The new modulus %d is not a factor of %d, the modulus of existing partition \"%s\".",
 												   spec->modulus, next_modulus,
 												   get_rel_name(partdesc->oids[boundinfo->indexes[offset + 1]]))));
 						}
diff --git a/src/test/regress/expected/create_table.out b/src/test/regress/expected/create_table.out
index a392df2d6a..ad89dd05c1 100644
--- a/src/test/regress/expected/create_table.out
+++ b/src/test/regress/expected/create_table.out
@@ -780,14 +780,14 @@ CREATE TABLE hash_parted (
 CREATE TABLE hpart_1 PARTITION OF hash_parted FOR VALUES WITH (MODULUS 10, REMAINDER 0);
 CREATE TABLE hpart_2 PARTITION OF hash_parted FOR VALUES WITH (MODULUS 50, REMAINDER 1);
 CREATE TABLE hpart_3 PARTITION OF hash_parted FOR VALUES WITH (MODULUS 200, REMAINDER 2);
--- modulus 25 is factor of modulus of 50 but 10 is not factor of 25.
+-- modulus 25 is factor of modulus of 50 but 10 is not a factor of 25.
 CREATE TABLE fail_part PARTITION OF hash_parted FOR VALUES WITH (MODULUS 25, REMAINDER 3);
 ERROR:  every hash partition modulus must be a factor of the next larger modulus
 DETAIL:  The new modulus 25 is not divisible by 10, the modulus of existing partition "hpart_1".
--- previous modulus 50 is factor of 150 but this modulus is not factor of next modulus 200.
+-- previous modulus 50 is factor of 150 but this modulus is not a factor of next modulus 200.
 CREATE TABLE fail_part PARTITION OF hash_parted FOR VALUES WITH (MODULUS 150, REMAINDER 3);
 ERROR:  every hash partition modulus must be a factor of the next larger modulus
-DETAIL:  The new modulus 150 is not factor of 200, the modulus of existing partition "hpart_3".
+DETAIL:  The new modulus 150 is not a factor of 200, the modulus of existing partition "hpart_3".
 -- trying to specify range for the hash partitioned table
 CREATE TABLE fail_part PARTITION OF hash_parted FOR VALUES FROM ('a', 1) TO ('z');
 ERROR:  invalid bound specification for a hash partition
diff --git a/src/test/regress/sql/create_table.sql b/src/test/regress/sql/create_table.sql
index d257679ba6..54cbf6c059 100644
--- a/src/test/regress/sql/create_table.sql
+++ b/src/test/regress/sql/create_table.sql
@@ -631,9 +631,9 @@ CREATE TABLE hash_parted (
 CREATE TABLE hpart_1 PARTITION OF hash_parted FOR VALUES WITH (MODULUS 10, REMAINDER 0);
 CREATE TABLE hpart_2 PARTITION OF hash_parted FOR VALUES WITH (MODULUS 50, REMAINDER 1);
 CREATE TABLE hpart_3 PARTITION OF hash_parted FOR VALUES WITH (MODULUS 200, REMAINDER 2);
--- modulus 25 is factor of modulus of 50 but 10 is not factor of 25.
+-- modulus 25 is factor of modulus of 50 but 10 is not a factor of 25.
 CREATE TABLE fail_part PARTITION OF hash_parted FOR VALUES WITH (MODULUS 25, REMAINDER 3);
--- previous modulus 50 is factor of 150 but this modulus is not factor of next modulus 200.
+-- previous modulus 50 is factor of 150 but this modulus is not a factor of next modulus 200.
 CREATE TABLE fail_part PARTITION OF hash_parted FOR VALUES WITH (MODULUS 150, REMAINDER 3);
 -- trying to specify range for the hash partitioned table
 CREATE TABLE fail_part PARTITION OF hash_parted FOR VALUES FROM ('a', 1) TO ('z');