diff --git a/README.md b/README.md
index 6a859f2..66aa98f 100644
--- a/README.md
+++ b/README.md
@@ -97,7 +97,7 @@ Specify the number of probes (1 by default)
 SET ivfflat.probes = 1;
 ```
 
-A higher value improves recall at the cost of speed.
+A higher value improves recall at the cost of speed, and it can be set to the number of lists for exact nearest neighbor search.
 
 Use `SET LOCAL` inside a transaction to set it for a single query