diff --git a/activerecord/lib/active_record/session_store.rb b/activerecord/lib/active_record/session_store.rb
index bd976acdbb..365fcd6222 100644
--- a/activerecord/lib/active_record/session_store.rb
+++ b/activerecord/lib/active_record/session_store.rb
@@ -82,7 +82,7 @@ def unmarshal(data)
         def create_table!
           connection.execute <<-end_sql
             CREATE TABLE #{table_name} (
-              id INTEGER PRIMARY KEY,
+              id #{connection.type_to_sql(:primary_key)},
               #{connection.quote_column_name(session_id_column)} VARCHAR(255) UNIQUE,
               #{connection.quote_column_name(data_column_name)} VARCHAR(255)
             )
@@ -219,7 +219,7 @@ def unmarshal(data)
         def create_table!
           connection.execute <<-end_sql
             CREATE TABLE #{table_name} (
-              id INTEGER PRIMARY KEY,
+              id #{connection.type_to_sql(:primary_key)},
               #{connection.quote_column_name(session_id_column)} VARCHAR(255) UNIQUE,
               #{connection.quote_column_name(data_column)} TEXT
             )