diff --git a/lucene/CHANGES.txt b/lucene/CHANGES.txt
index d7a8d5960f5..cc8e21d95ae 100644
--- a/lucene/CHANGES.txt
+++ b/lucene/CHANGES.txt
@@ -420,6 +420,9 @@ Bug Fixes
 * LUCENE-10110: MultiCollector now handles single leaf collector that wants to skip low-scoring hits
  but the combined score mode doesn't allow it. (Jim Ferenczi)
 
+* LUCENE-10111: Missing calculating the bytes used of DocsWithFieldSet in NormValuesWriter.
+  (Lu Xugang)
+
 Build
 ---------------------
 
diff --git a/lucene/core/src/java/org/apache/lucene/index/NormValuesWriter.java b/lucene/core/src/java/org/apache/lucene/index/NormValuesWriter.java
index 202db7e6646..8fe73768f61 100644
--- a/lucene/core/src/java/org/apache/lucene/index/NormValuesWriter.java
+++ b/lucene/core/src/java/org/apache/lucene/index/NormValuesWriter.java
@@ -60,7 +60,7 @@ class NormValuesWriter {
   }
 
   private void updateBytesUsed() {
-    final long newBytesUsed = pending.ramBytesUsed();
+    final long newBytesUsed = pending.ramBytesUsed() + docsWithField.ramBytesUsed();
     iwBytesUsed.addAndGet(newBytesUsed - bytesUsed);
     bytesUsed = newBytesUsed;
   }