diff --git a/lib/generators/active_record/devise_generator.rb b/lib/generators/active_record/devise_generator.rb
index 2d74d3f5..e4b66f08 100644
--- a/lib/generators/active_record/devise_generator.rb
+++ b/lib/generators/active_record/devise_generator.rb
@@ -53,8 +53,8 @@ module ActiveRecord
       t.integer  :sign_in_count, default: 0, null: false
       t.datetime :current_sign_in_at
       t.datetime :last_sign_in_at
-      t.string   :current_sign_in_ip
-      t.string   :last_sign_in_ip
+      t.#{ip_column} :current_sign_in_ip
+      t.#{ip_column} :last_sign_in_ip
 
       ## Confirmable
       # t.string   :confirmation_token
@@ -68,6 +68,19 @@ module ActiveRecord
       # t.datetime :locked_at
 RUBY
       end
+
+      def ip_column
+        # Padded with spaces so it aligns nicely with the rest of the columns.
+        "%-8s" % (inet? ? "inet" : "string")
+      end
+
+      def inet?
+        Devise.rails4? && postgresql?
+      end
+
+      def postgresql?
+        ActiveRecord::Base.connection.adapter_name.downcase == "postgresql"
+      end
     end
   end
 end
diff --git a/test/generators/active_record_generator_test.rb b/test/generators/active_record_generator_test.rb
index 885e8ad7..e032bd9b 100644
--- a/test/generators/active_record_generator_test.rb
+++ b/test/generators/active_record_generator_test.rb
@@ -37,6 +37,12 @@ if DEVISE_ORM == :active_record
       assert_no_file "app/models/monster.rb"
       assert_no_migration "db/migrate/devise_create_monsters.rb"
     end
+
+    test "use string column type for ip addresses" do
+      run_generator %w(monster)
+      assert_migration "db/migrate/devise_create_monsters.rb", /t.string   :current_sign_in_ip/
+      assert_migration "db/migrate/devise_create_monsters.rb", /t.string   :last_sign_in_ip/
+    end
   end
 
   module RailsEngine