diff --git a/src/hnswscan.c b/src/hnswscan.c
index d314095..d530795 100644
--- a/src/hnswscan.c
+++ b/src/hnswscan.c
@@ -334,6 +334,7 @@ hnswgetbatch(IndexScanDesc scan, IndexScanBatch priorbatch, ScanDirection dir)
 			nitems++;
 		}
 
+		/* Needed for strict iterative scans */
 		if (nitems == 0)
 			break;