diff --git a/CHANGELOG.md b/CHANGELOG.md
index 94e43feed5..606c87a57f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@
 * [#482](https://github.com/rubocop/rubocop-rails/pull/482): Fix a false positive for `Rails/RelativeDateConstant` when assigning (hashes/arrays/etc)-containing procs to a constant. ([@jdelStrother][])
 * [#419](https://github.com/rubocop/rubocop-rails/issues/419): Fix an error for `Rails/UniqueValidationWithoutIndex` when using a unique index and `check_constraint` that has `nil` first argument. ([@koic][])
 * [#70](https://github.com/rubocop/rubocop-rails/issues/70): Fix a false positive for `Rails/TimeZone` when setting `EnforcedStyle: strict` and using `Time.current`. ([@koic][])
+* [#488](https://github.com/rubocop/rubocop-rails/issues/488): Fix a false positive for `Rails/ReversibleMigrationMethodDefinition` when using cbase migration class. ([@koic][])
 
 ### Changes
 
diff --git a/lib/rubocop/cop/rails/reversible_migration_method_definition.rb b/lib/rubocop/cop/rails/reversible_migration_method_definition.rb
index 4a2b90d1ba..29914b49d5 100644
--- a/lib/rubocop/cop/rails/reversible_migration_method_definition.rb
+++ b/lib/rubocop/cop/rails/reversible_migration_method_definition.rb
@@ -50,7 +50,7 @@ class ReversibleMigrationMethodDefinition < Base
           (class
             (const nil? _)
             (send
-              (const (const nil? :ActiveRecord) :Migration)
+              (const (const {nil? cbase} :ActiveRecord) :Migration)
               :[]
               (float _))
             _)
diff --git a/spec/rubocop/cop/rails/reversible_migration_method_definition_spec.rb b/spec/rubocop/cop/rails/reversible_migration_method_definition_spec.rb
index 32d5d00a78..e91ca72c90 100644
--- a/spec/rubocop/cop/rails/reversible_migration_method_definition_spec.rb
+++ b/spec/rubocop/cop/rails/reversible_migration_method_definition_spec.rb
@@ -96,4 +96,14 @@ def change
       end
     RUBY
   end
+
+  it 'does not register offenses correctly with any cbase migration class' do
+    expect_no_offenses(<<~RUBY)
+      class SomeMigration < ::ActiveRecord::Migration[5.2]
+        def change
+          add_column :users, :email, :text, null: false
+        end
+      end
+    RUBY
+  end
 end