diff --git a/src/hnswscan.c b/src/hnswscan.c
index fd8faca..3cf2fd3 100644
--- a/src/hnswscan.c
+++ b/src/hnswscan.c
@@ -185,6 +185,9 @@ hnswgettuple(IndexScanDesc scan, ScanDirection dir)
 			Datum		value = PointerGetDatum(hc->element->vec);
 			bool		isnull = false;
 
+			if (scan->xs_itup)
+				pfree(scan->xs_itup);
+
 			scan->xs_itup = index_form_tuple(scan->xs_itupdesc, &value, &isnull);
 			scan->xs_itup->t_tid = *tid;
 		}
@@ -229,6 +232,9 @@ hnswendscan(IndexScanDesc scan)
 	if (BufferIsValid(so->buf))
 		ReleaseBuffer(so->buf);
 
+	if (scan->xs_itup)
+		pfree(scan->xs_itup);
+
 	MemoryContextDelete(so->tmpCtx);
 
 	pfree(so);