diff --git a/README.md b/README.md
index 12303de..f373014 100644
--- a/README.md
+++ b/README.md
@@ -505,7 +505,7 @@ SET hnsw.max_scan_tuples = 20000;
 
 Note: This is approximate and does not apply to the initial scan
 
-When increasing this, you may also need to increase the max amount of memory an iterative scan can use, which is a multiple of `work_mem` (1 by default)
+When increasing this (or using a lower `work_mem` than default), you may also need to increase the max amount of memory an iterative scan can use, which is a multiple of `work_mem` (1 by default)
 
 ```sql
 SET hnsw.scan_mem_multiplier = 2;