diff --git a/lib/litestack/railtie.rb b/lib/litestack/railtie.rb
index 818498b..9ea8079 100644
--- a/lib/litestack/railtie.rb
+++ b/lib/litestack/railtie.rb
@@ -3,7 +3,7 @@
 module Litestack
   class Railtie < ::Rails::Railtie
     initializer :disable_production_sqlite_warning do |app|
-      if config.active_record.key?(:sqlite3_production_warning)
+      if config.respond_to?(:active_record) && config.active_record.key?(:sqlite3_production_warning)
         # The whole point of this gem is to use sqlite3 in production.
         app.config.active_record.sqlite3_production_warning = false
       end