diff --git a/core/src/main/java/org/elasticsearch/cluster/routing/allocation/decider/SameShardAllocationDecider.java b/core/src/main/java/org/elasticsearch/cluster/routing/allocation/decider/SameShardAllocationDecider.java
index 5da75276784..3f2921dfcdc 100644
--- a/core/src/main/java/org/elasticsearch/cluster/routing/allocation/decider/SameShardAllocationDecider.java
+++ b/core/src/main/java/org/elasticsearch/cluster/routing/allocation/decider/SameShardAllocationDecider.java
@@ -23,13 +23,14 @@ import org.elasticsearch.cluster.routing.RoutingNode;
 import org.elasticsearch.cluster.routing.ShardRouting;
 import org.elasticsearch.cluster.routing.allocation.RoutingAllocation;
 import org.elasticsearch.common.Strings;
+import org.elasticsearch.common.settings.Setting;
 import org.elasticsearch.common.settings.Settings;
 
 /**
  * An allocation decider that prevents multiple instances of the same shard to
  * be allocated on the same <tt>node</tt>.
  *
- * The {@value #SAME_HOST_SETTING} setting allows to perform a check to prevent
+ * The {@link #CLUSTER_ROUTING_ALLOCATION_SAME_HOST_SETTING} setting allows to perform a check to prevent
  * allocation of multiple instances of the same shard on a single <tt>host</tt>,
  * based on host name and host address. Defaults to `false`, meaning that no
  * check is performed by default.
@@ -44,14 +45,15 @@ public class SameShardAllocationDecider extends AllocationDecider {
 
     public static final String NAME = "same_shard";
 
-    public static final String SAME_HOST_SETTING = "cluster.routing.allocation.same_shard.host";
+    public static final Setting<Boolean> CLUSTER_ROUTING_ALLOCATION_SAME_HOST_SETTING =
+        Setting.boolSetting("cluster.routing.allocation.same_shard.host", false, Setting.Property.NodeScope);
 
     private final boolean sameHost;
 
     public SameShardAllocationDecider(Settings settings) {
         super(settings);
 
-        this.sameHost = settings.getAsBoolean(SAME_HOST_SETTING, false);
+        this.sameHost = CLUSTER_ROUTING_ALLOCATION_SAME_HOST_SETTING.get(settings);
     }
 
     @Override
diff --git a/core/src/main/java/org/elasticsearch/common/settings/ClusterSettings.java b/core/src/main/java/org/elasticsearch/common/settings/ClusterSettings.java
index 3ce483d0fa6..094530dac67 100644
--- a/core/src/main/java/org/elasticsearch/common/settings/ClusterSettings.java
+++ b/core/src/main/java/org/elasticsearch/common/settings/ClusterSettings.java
@@ -39,6 +39,7 @@ import org.elasticsearch.cluster.routing.allocation.decider.ClusterRebalanceAllo
 import org.elasticsearch.cluster.routing.allocation.decider.ConcurrentRebalanceAllocationDecider;
 import org.elasticsearch.cluster.routing.allocation.decider.EnableAllocationDecider;
 import org.elasticsearch.cluster.routing.allocation.decider.FilterAllocationDecider;
+import org.elasticsearch.cluster.routing.allocation.decider.SameShardAllocationDecider;
 import org.elasticsearch.cluster.routing.allocation.decider.ShardsLimitAllocationDecider;
 import org.elasticsearch.cluster.routing.allocation.decider.SnapshotInProgressAllocationDecider;
 import org.elasticsearch.cluster.routing.allocation.decider.ThrottlingAllocationDecider;
@@ -198,6 +199,7 @@ public final class ClusterSettings extends AbstractScopedSettings {
                     DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_DISK_THRESHOLD_ENABLED_SETTING,
                     DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_INCLUDE_RELOCATIONS_SETTING,
                     DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_REROUTE_INTERVAL_SETTING,
+                    SameShardAllocationDecider.CLUSTER_ROUTING_ALLOCATION_SAME_HOST_SETTING,
                     InternalClusterInfoService.INTERNAL_CLUSTER_INFO_UPDATE_INTERVAL_SETTING,
                     InternalClusterInfoService.INTERNAL_CLUSTER_INFO_TIMEOUT_SETTING,
                     SnapshotInProgressAllocationDecider.CLUSTER_ROUTING_ALLOCATION_SNAPSHOT_RELOCATION_ENABLED_SETTING,
diff --git a/core/src/test/java/org/elasticsearch/cluster/routing/allocation/SameShardRoutingTests.java b/core/src/test/java/org/elasticsearch/cluster/routing/allocation/SameShardRoutingTests.java
index 4def9e6ed71..908ec3a4236 100644
--- a/core/src/test/java/org/elasticsearch/cluster/routing/allocation/SameShardRoutingTests.java
+++ b/core/src/test/java/org/elasticsearch/cluster/routing/allocation/SameShardRoutingTests.java
@@ -47,8 +47,8 @@ public class SameShardRoutingTests extends ESAllocationTestCase {
     private final ESLogger logger = Loggers.getLogger(SameShardRoutingTests.class);
 
     public void testSameHost() {
-        AllocationService strategy = createAllocationService(Settings.builder()
-                .put(SameShardAllocationDecider.SAME_HOST_SETTING, true).build());
+        AllocationService strategy = createAllocationService(
+            Settings.builder().put(SameShardAllocationDecider.CLUSTER_ROUTING_ALLOCATION_SAME_HOST_SETTING.getKey(), true).build());
 
         MetaData metaData = MetaData.builder()
                 .put(IndexMetaData.builder("test").settings(settings(Version.CURRENT)).numberOfShards(2).numberOfReplicas(1))