diff --git a/plugins/discovery-ec2/src/main/java/org/elasticsearch/plugin/discovery/ec2/Ec2DiscoveryPlugin.java b/plugins/discovery-ec2/src/main/java/org/elasticsearch/plugin/discovery/ec2/Ec2DiscoveryPlugin.java
index b4c293ec736..7582e138c61 100644
--- a/plugins/discovery-ec2/src/main/java/org/elasticsearch/plugin/discovery/ec2/Ec2DiscoveryPlugin.java
+++ b/plugins/discovery-ec2/src/main/java/org/elasticsearch/plugin/discovery/ec2/Ec2DiscoveryPlugin.java
@@ -134,6 +134,7 @@ public class Ec2DiscoveryPlugin extends Plugin {
         settingsModule.registerSetting(AwsEc2Service.DISCOVERY_EC2.GROUPS_SETTING);
         settingsModule.registerSetting(AwsEc2Service.DISCOVERY_EC2.AVAILABILITY_ZONES_SETTING);
         settingsModule.registerSetting(AwsEc2Service.DISCOVERY_EC2.NODE_CACHE_TIME_SETTING);
+        settingsModule.registerSetting(AwsEc2Service.DISCOVERY_EC2.TAG_SETTING);
     }
 
     /**