diff --git a/config/initializers/session_store.rb b/config/initializers/session_store.rb
index 64ed9fe58..eee49a519 100644
--- a/config/initializers/session_store.rb
+++ b/config/initializers/session_store.rb
@@ -5,4 +5,6 @@
 # Use the database for sessions instead of the cookie-based default,
 # which shouldn't be used to store highly confidential information
 # (create the session table with "rails generate session_migration")
-Zammad::Application.config.session_store :active_record_store
+Zammad::Application.config.session_store :active_record_store, {
+  :key => '_zammad_session_' + Digest::MD5.hexdigest(Rails.root.to_s).to_s[5..15]
+}