diff --git a/core/src/main/java/org/elasticsearch/action/index/TransportIndexAction.java b/core/src/main/java/org/elasticsearch/action/index/TransportIndexAction.java
index 06a417240d4..6fb7ab6e977 100644
--- a/core/src/main/java/org/elasticsearch/action/index/TransportIndexAction.java
+++ b/core/src/main/java/org/elasticsearch/action/index/TransportIndexAction.java
@@ -222,7 +222,7 @@ public class TransportIndexAction extends TransportReplicationAction<IndexReques
             update = operation.parsedDoc().dynamicMappingsUpdate();
             if (update != null) {
                 throw new RetryOnPrimaryException(shardId,
-                    "Dynamics mappings are not available on the node that holds the primary yet");
+                    "Dynamic mappings are not available on the node that holds the primary yet");
             }
         }
         final boolean created = indexShard.index(operation);