diff --git a/core/src/main/java/org/elasticsearch/index/mapper/MapperService.java b/core/src/main/java/org/elasticsearch/index/mapper/MapperService.java
index b1630ed7020..946ee5b7a17 100755
--- a/core/src/main/java/org/elasticsearch/index/mapper/MapperService.java
+++ b/core/src/main/java/org/elasticsearch/index/mapper/MapperService.java
@@ -20,6 +20,7 @@
 package org.elasticsearch.index.mapper;
 
 import com.carrotsearch.hppc.ObjectHashSet;
+import com.google.common.base.Function;
 import com.google.common.base.Predicate;
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableMap;
@@ -72,7 +73,6 @@ import java.util.List;
 import java.util.Map;
 import java.util.concurrent.CopyOnWriteArrayList;
 import java.util.concurrent.locks.ReentrantReadWriteLock;
-import java.util.function.Function;
 
 import static org.elasticsearch.common.collect.MapBuilder.newMapBuilder;