diff --git a/common/main/java/com/couchbase/lite/Document.java b/common/main/java/com/couchbase/lite/Document.java
index fb8e6922f..e62e871dd 100644
--- a/common/main/java/com/couchbase/lite/Document.java
+++ b/common/main/java/com/couchbase/lite/Document.java
@@ -136,6 +136,7 @@ static Document getDocumentWithRevisions(@NonNull Collection collection, @NonNul
 
     // Set by setData(FLSliceResult,boolean) to keep the Fleece backing store from being GC'd.
     // (This is kind of a hack, and it's only used ephemerally by Kotlin serialization.)
+    @SuppressWarnings("PMD.SingularField")
     @GuardedBy("lock")
     @Nullable
     private FLSliceResult extraBackingStore;
@@ -632,7 +633,7 @@ private void setC4Document(@Nullable C4Document c4doc, boolean mutable) {
     // for use by CollectionExtensions.kt
     void setContent(@NonNull FLSliceResult fleeceData, boolean mutable) {
         synchronized (lock) {
-            var data = FLValue.fromData(fleeceData).asFLDict();
+            final FLDict data = FLValue.fromData(fleeceData).asFLDict();
             extraBackingStore = fleeceData;
             setContentLocked(data, mutable);
         }