diff --git a/activerecord/lib/active_record/persistence.rb b/activerecord/lib/active_record/persistence.rb
index 72ccf7739fa3695221fe076a0c1c236fe83e8aae..a09b5f0e96679b28cd2693aea6f41fa63ac123ff 100644
--- a/activerecord/lib/active_record/persistence.rb
+++ b/activerecord/lib/active_record/persistence.rb
@@ -93,7 +93,7 @@ def insert(attributes, returning: nil, unique_by: nil)
# record or pass returning: false to omit the clause.
#
# [:unique_by]
- # (Postgres and SQLite only) In a table with more than one unique constaint or index,
+ # (Postgres and SQLite only) In a table with more than one unique constraint or index,
# new records may considered duplicates according to different criteria. By default,
# new rows will be skipped if they violate _any_ unique constraint/index. By defining
# :unique_by, you can skip rows that would create duplicates according to the given
@@ -218,7 +218,7 @@ def upsert(attributes, returning: nil, unique_by: nil)
# record or pass returning: false to omit the clause.
#
# [:unique_by]
- # (Postgres and SQLite only) In a table with more than one unique constaint or index,
+ # (Postgres and SQLite only) In a table with more than one unique constraint or index,
# new records may considered duplicates according to different criteria. For MySQL,
# an upsert will take place if a new record violates _any_ unique constraint. For
# Postgres and SQLite, new rows will replace existing rows when the new row has the