diff --git a/conf/cassandra.yaml b/conf/cassandra.yaml
index 2f6a7da7bd..14cc525a75 100644
--- a/conf/cassandra.yaml
+++ b/conf/cassandra.yaml
@@ -32,7 +32,7 @@ hinted_handoff_throttle_delay_in_ms: 1
 # The following setting populates the page cache on memtable flush and compaction
 # WARNING: Enable this setting only when the whole node's data fits in memory.
 # Defaults to: false
-# populate_buffer_cache_on_flush: false
+# populate_io_cache_on_flush: false
 
 # authentication backend, implementing IAuthenticator; used to identify users
 authenticator: org.apache.cassandra.auth.AllowAllAuthenticator