diff --git a/solr/core/src/java/org/apache/solr/uninverting/FieldCacheImpl.java b/solr/core/src/java/org/apache/solr/uninverting/FieldCacheImpl.java
index f8bf77485af..f06f7e3fb03 100644
--- a/solr/core/src/java/org/apache/solr/uninverting/FieldCacheImpl.java
+++ b/solr/core/src/java/org/apache/solr/uninverting/FieldCacheImpl.java
@@ -112,7 +112,7 @@ class FieldCacheImpl implements FieldCache {
   }
 
   // per-segment fieldcaches don't purge until the shared core closes.
-  final SegmentReader.CoreClosedListener purgeCore = ownerCoreCacheKey -> FieldCacheImpl.this.purgeByCacheKey(ownerCoreCacheKey);
+  final SegmentReader.CoreClosedListener purgeCore = FieldCacheImpl.this::purgeByCacheKey;
   
   private void initReader(LeafReader reader) {
     reader.addCoreClosedListener(purgeCore);