diff --git a/tsl/src/reorder.c b/tsl/src/reorder.c
index 5b3749f15..196e905a5 100644
--- a/tsl/src/reorder.c
+++ b/tsl/src/reorder.c
@@ -729,6 +729,7 @@ copy_heap_data(Oid OIDNewHeap, Oid OIDOldHeap, Oid OIDOldIndex, bool verbose,
 
 		CHECK_FOR_INTERRUPTS();
 
+		Assert((heapScan != NULL && indexScan == NULL) || (indexScan != NULL && heapScan == NULL));
 		if (indexScan != NULL)
 		{
 			tuple = index_getnext(indexScan, ForwardScanDirection);
@@ -741,7 +742,7 @@ copy_heap_data(Oid OIDNewHeap, Oid OIDOldHeap, Oid OIDOldIndex, bool verbose,
 
 			buf = indexScan->xs_cbuf;
 		}
-		else
+		if (heapScan != NULL)
 		{
 			tuple = heap_getnext(heapScan, ForwardScanDirection);
 			if (tuple == NULL)