diff --git a/lib/recaptcha/configuration.rb b/lib/recaptcha/configuration.rb
index c1f7d7be..087ec933 100644
--- a/lib/recaptcha/configuration.rb
+++ b/lib/recaptcha/configuration.rb
@@ -50,7 +50,7 @@ def initialize #:nodoc:
       @site_key = ENV['RECAPTCHA_SITE_KEY']
 
       @enterprise = ENV['RECAPTCHA_ENTERPRISE'] == 'true'
-      @api_key = ENV['RECAPTCHA_ENTERPISE_API_KEY']
+      @api_key = ENV['RECAPTCHA_ENTERPRISE_API_KEY']
       @project_id = ENV['RECAPTCHA_ENTERPRISE_PROJECT_ID']
 
       @verify_url = nil