diff --git a/gerrit-server/src/main/java/com/google/gerrit/server/notedb/RevisionNote.java b/gerrit-server/src/main/java/com/google/gerrit/server/notedb/RevisionNote.java
index d93336a3da..4c9f7026e8 100644
--- a/gerrit-server/src/main/java/com/google/gerrit/server/notedb/RevisionNote.java
+++ b/gerrit-server/src/main/java/com/google/gerrit/server/notedb/RevisionNote.java
@@ -83,7 +83,7 @@ class RevisionNote {
 
     if (isJson(raw, p.value)) {
       RevisionNoteData data = parseJson(noteUtil, p.value);
-      comments = data.exportComments(status);
+      comments = data.exportComments(changeId, status);
       if (status == PatchLineComment.Status.PUBLISHED) {
         pushCert = data.pushCert;
       } else {
diff --git a/gerrit-server/src/main/java/com/google/gerrit/server/notedb/RevisionNoteData.java b/gerrit-server/src/main/java/com/google/gerrit/server/notedb/RevisionNoteData.java
index 9998ba0c76..73083b797d 100644
--- a/gerrit-server/src/main/java/com/google/gerrit/server/notedb/RevisionNoteData.java
+++ b/gerrit-server/src/main/java/com/google/gerrit/server/notedb/RevisionNoteData.java
@@ -48,19 +48,17 @@ class RevisionNoteData {
     String uuid;
     String filename;
     int patchSetId;
-    int changeId;
 
     CommentKey(PatchLineComment.Key k) {
       uuid = k.get();
       filename = k.getParentKey().getFileName();
       patchSetId = k.getParentKey().getParentKey().get();
-      changeId = k.getParentKey().getParentKey().getParentKey().get();
     }
 
-    PatchLineComment.Key export() {
+    PatchLineComment.Key export(Change.Id changeId) {
       return new PatchLineComment.Key(
           new Patch.Key(
-              new PatchSet.Id(new Change.Id(changeId), patchSetId),
+              new PatchSet.Id(changeId, patchSetId),
               filename),
           uuid);
     }
@@ -112,9 +110,10 @@ class RevisionNoteData {
       this.serverId = serverId;
     }
 
-    PatchLineComment export(PatchLineComment.Status status) {
+    PatchLineComment export(Change.Id changeId,
+        PatchLineComment.Status status) {
       PatchLineComment plc = new PatchLineComment(
-          key.export(), lineNbr, author.export(), parentUuid, writtenOn);
+          key.export(changeId), lineNbr, author.export(), parentUuid, writtenOn);
       plc.setSide(side);
       plc.setMessage(message);
       if (range != null) {
@@ -131,11 +130,12 @@ class RevisionNoteData {
   String pushCert;
   List<Comment> comments;
 
-  ImmutableList<PatchLineComment> exportComments(
+
+  ImmutableList<PatchLineComment> exportComments(Change.Id changeId,
       PatchLineComment.Status status) {
     return ImmutableList.copyOf(
         comments.stream()
-            .map(c -> c.export(status))
+            .map(c -> c.export(changeId, status))
             .collect(toList()));
   }
 }