diff --git a/server/src/main/java/org/elasticsearch/action/admin/indices/diskusage/IndexDiskUsageAnalyzer.java b/server/src/main/java/org/elasticsearch/action/admin/indices/diskusage/IndexDiskUsageAnalyzer.java
index 2f57b59c165e2..3c3ebd0dc43a0 100644
--- a/server/src/main/java/org/elasticsearch/action/admin/indices/diskusage/IndexDiskUsageAnalyzer.java
+++ b/server/src/main/java/org/elasticsearch/action/admin/indices/diskusage/IndexDiskUsageAnalyzer.java
@@ -56,6 +56,7 @@
 import org.elasticsearch.core.CheckedConsumer;
 import org.elasticsearch.core.IOUtils;
 import org.elasticsearch.index.codec.postings.ES812PostingsFormat;
+import org.elasticsearch.index.codec.postings.ES814InlinePostingsFormat;
 import org.elasticsearch.index.shard.ShardId;
 import org.elasticsearch.index.store.LuceneFilesExtensions;
 
@@ -303,6 +304,9 @@ private static void readProximity(Terms terms, PostingsEnum postings) throws IOE
     private static BlockTermState getBlockTermState(TermsEnum termsEnum, BytesRef term) throws IOException {
         if (term != null && termsEnum.seekExact(term)) {
             final TermState termState = termsEnum.termState();
+            if (termState instanceof final ES814InlinePostingsFormat.InlineTermState ts) {
+                return new BlockTermState(ts.docOffset, ts.proxOffset, 0 /* no payloads */);
+            }
             if (termState instanceof final ES812PostingsFormat.IntBlockTermState blockTermState) {
                 return new BlockTermState(blockTermState.docStartFP, blockTermState.posStartFP, blockTermState.payStartFP);
             }