diff --git a/db/migrate/041_rename_comment_to_comments.rb b/db/migrate/041_rename_comment_to_comments.rb
index 02391091a..300c239f6 100644
--- a/db/migrate/041_rename_comment_to_comments.rb
+++ b/db/migrate/041_rename_comment_to_comments.rb
@@ -8,6 +8,6 @@ class RenameCommentToComments < ActiveRecord::Migration[4.2]
   end
 
   def self.down
-    raise IrreversibleMigration
+    raise ActiveRecord::IrreversibleMigration
   end
 end
diff --git a/db/migrate/044_set_language_length_to_five.rb b/db/migrate/044_set_language_length_to_five.rb
index 1e600690f..524b2327d 100644
--- a/db/migrate/044_set_language_length_to_five.rb
+++ b/db/migrate/044_set_language_length_to_five.rb
@@ -4,6 +4,6 @@ class SetLanguageLengthToFive < ActiveRecord::Migration[4.2]
   end
 
   def self.down
-    raise IrreversibleMigration
+    raise ActiveRecord::IrreversibleMigration
   end
 end
diff --git a/db/migrate/048_allow_null_version_effective_date.rb b/db/migrate/048_allow_null_version_effective_date.rb
index 9cce1e3f6..d8695af0a 100644
--- a/db/migrate/048_allow_null_version_effective_date.rb
+++ b/db/migrate/048_allow_null_version_effective_date.rb
@@ -4,6 +4,6 @@ class AllowNullVersionEffectiveDate < ActiveRecord::Migration[4.2]
   end
 
   def self.down
-    raise IrreversibleMigration
+    raise ActiveRecord::IrreversibleMigration
   end
 end
diff --git a/db/migrate/064_drop_permissions.rb b/db/migrate/064_drop_permissions.rb
index 6d39519fe..326e35f50 100644
--- a/db/migrate/064_drop_permissions.rb
+++ b/db/migrate/064_drop_permissions.rb
@@ -5,6 +5,6 @@ class DropPermissions < ActiveRecord::Migration[4.2]
   end
 
   def self.down
-    raise IrreversibleMigration
+    raise ActiveRecord::IrreversibleMigration
   end
 end
diff --git a/db/migrate/077_remove_issue_statuses_html_color.rb b/db/migrate/077_remove_issue_statuses_html_color.rb
index fdf64ce29..c6e14891a 100644
--- a/db/migrate/077_remove_issue_statuses_html_color.rb
+++ b/db/migrate/077_remove_issue_statuses_html_color.rb
@@ -4,6 +4,6 @@ class RemoveIssueStatusesHtmlColor < ActiveRecord::Migration[4.2]
   end
 
   def self.down
-    raise IrreversibleMigration
+    raise ActiveRecord::IrreversibleMigration
   end
 end
diff --git a/db/migrate/20090503121510_drop_members_role_id.rb b/db/migrate/20090503121510_drop_members_role_id.rb
index 7b8e3cf9a..c1caa70e8 100644
--- a/db/migrate/20090503121510_drop_members_role_id.rb
+++ b/db/migrate/20090503121510_drop_members_role_id.rb
@@ -4,6 +4,6 @@ class DropMembersRoleId < ActiveRecord::Migration[4.2]
   end
 
   def self.down
-    raise IrreversibleMigration
+    raise ActiveRecord::IrreversibleMigration
   end
 end