diff --git a/src/backend/access/transam/xact.c b/src/backend/access/transam/xact.c
index d119ab909d..8540e70e70 100644
--- a/src/backend/access/transam/xact.c
+++ b/src/backend/access/transam/xact.c
@@ -965,29 +965,9 @@ TransactionIdIsCurrentTransactionId(TransactionId xid)
 	 * the XIDs in this array are sorted numerically rather than according to
 	 * transactionIdPrecedes order.
 	 */
-	if (nParallelCurrentXids > 0)
-	{
-		int			low,
-					high;
-
-		low = 0;
-		high = nParallelCurrentXids - 1;
-		while (low <= high)
-		{
-			int			middle;
-			TransactionId probe;
-
-			middle = low + (high - low) / 2;
-			probe = ParallelCurrentXids[middle];
-			if (probe == xid)
-				return true;
-			else if (probe < xid)
-				low = middle + 1;
-			else
-				high = middle - 1;
-		}
-		return false;
-	}
+	if (bsearch(&xid, ParallelCurrentXids, nParallelCurrentXids,
+				sizeof(TransactionId), xidComparator))
+		return true;
 
 	/*
 	 * We will return true for the Xid of the current subtransaction, any of