diff --git a/src/backend/commands/vacuum.c b/src/backend/commands/vacuum.c
index faa1812..cd8be92 100644
--- a/src/backend/commands/vacuum.c
+++ b/src/backend/commands/vacuum.c
@@ -1192,13 +1192,6 @@ vac_truncate_clog(TransactionId frozenXID,
 	AdvanceOldestCommitTsXid(frozenXID);
 
 	/*
-	 * Truncate CLOG, multixact and CommitTs to the oldest computed value.
-	 */
-	TruncateCLOG(frozenXID, oldestxid_datoid);
-	TruncateCommitTs(frozenXID);
-	TruncateMultiXact(minMulti, minmulti_datoid);
-
-	/*
 	 * Update the wrap limit for GetNewTransactionId and creation of new
 	 * MultiXactIds.  Note: these functions will also signal the postmaster
 	 * for an(other) autovac cycle if needed.   XXX should we avoid possibly
@@ -1206,6 +1199,14 @@ vac_truncate_clog(TransactionId frozenXID,
 	 */
 	SetTransactionIdLimit(frozenXID, oldestxid_datoid);
 	SetMultiXactIdLimit(minMulti, minmulti_datoid, false);
+
+	/*
+	 * Truncate CLOG, multixact and CommitTs to the oldest computed value
+	 * after advancing xid limits.
+	 */
+	TruncateCLOG(frozenXID, oldestxid_datoid);
+	TruncateCommitTs(frozenXID);
+	TruncateMultiXact(minMulti, minmulti_datoid);
 }