diff --git a/Documentation/device-mapper/cache.txt b/Documentation/device-mapper/cache.txt
index 79c7b6d..ff08417 100644
--- a/Documentation/device-mapper/cache.txt
+++ b/Documentation/device-mapper/cache.txt
@@ -119,7 +119,7 @@
 
 For the time being, a message "migration_threshold <#sectors>"
 can be used to set the maximum number of sectors being migrated,
-the default being 204800 sectors (100MB).
+the default being 2048 sectors (1MB).
 
 Updating on-disk metadata
 -------------------------