diff --git a/src/backend/replication/logical/snapbuild.c b/src/backend/replication/logical/snapbuild.c
index a14a3d6900..a5333349a8 100644
--- a/src/backend/replication/logical/snapbuild.c
+++ b/src/backend/replication/logical/snapbuild.c
@@ -1422,7 +1422,6 @@ SnapBuildWaitSnapshot(xl_running_xacts *running, TransactionId cutoff)
  * We store current state of struct SnapBuild on disk in the following manner:
  *
  * struct SnapBuildOnDisk;
- * TransactionId * running.xcnt_space;
  * TransactionId * committed.xcnt; (*not xcnt_space*)
  *
  */