diff --git a/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb b/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb
index 10961ed9c8..cccd6e2210 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb
@@ -579,13 +579,13 @@ module ActiveRecord
           m.alias_type %r(bit)i,           "binary"
 
           m.register_type(%r(enum)i) do |sql_type|
-            limit = sql_type[/^enum\((.+)\)/i, 1]
+            limit = sql_type[/^enum\s*\((.+)\)/i, 1]
               .split(",").map { |enum| enum.strip.length - 2 }.max
             MysqlString.new(limit: limit)
           end
 
           m.register_type(%r(^set)i) do |sql_type|
-            limit = sql_type[/^set\((.+)\)/i, 1]
+            limit = sql_type[/^set\s*\((.+)\)/i, 1]
               .split(",").map { |set| set.strip.length - 1 }.sum - 1
             MysqlString.new(limit: limit)
           end
diff --git a/activerecord/test/cases/connection_adapters/mysql_type_lookup_test.rb b/activerecord/test/cases/connection_adapters/mysql_type_lookup_test.rb
index 02e76ce146..38331aa641 100644
--- a/activerecord/test/cases/connection_adapters/mysql_type_lookup_test.rb
+++ b/activerecord/test/cases/connection_adapters/mysql_type_lookup_test.rb
@@ -27,8 +27,12 @@ if current_adapter?(:Mysql2Adapter)
         def test_string_types
           assert_lookup_type :string, "enum('one', 'two', 'three')"
           assert_lookup_type :string, "ENUM('one', 'two', 'three')"
+          assert_lookup_type :string, "enum ('one', 'two', 'three')"
+          assert_lookup_type :string, "ENUM ('one', 'two', 'three')"
           assert_lookup_type :string, "set('one', 'two', 'three')"
           assert_lookup_type :string, "SET('one', 'two', 'three')"
+          assert_lookup_type :string, "set ('one', 'two', 'three')"
+          assert_lookup_type :string, "SET ('one', 'two', 'three')"
         end
 
         def test_set_type_with_value_matching_other_type