diff --git a/app/models/miq_server/worker_management/monitor.rb b/app/models/miq_server/worker_management/monitor.rb
index 2e3f21e6d82..ae99df215c5 100644
--- a/app/models/miq_server/worker_management/monitor.rb
+++ b/app/models/miq_server/worker_management/monitor.rb
@@ -160,6 +160,7 @@ def set_last_change(key, value)
   end
 
   def key_store
+    require 'dalli'
     @key_store ||= Dalli::Client.new(MiqMemcached.server_address, :namespace => "server_monitor")
   end
 
diff --git a/app/models/miq_worker/runner.rb b/app/models/miq_worker/runner.rb
index f1d822e06ce..5c8ca9acca8 100644
--- a/app/models/miq_worker/runner.rb
+++ b/app/models/miq_worker/runner.rb
@@ -398,6 +398,7 @@ def get_messages
   end
 
   def key_store
+    require 'dalli'
     @key_store ||= Dalli::Client.new(MiqMemcached.server_address, :namespace => "server_monitor")
   end