diff --git a/conf/cassandra.yaml b/conf/cassandra.yaml
index e10afb6923..db924bbf5d 100644
--- a/conf/cassandra.yaml
+++ b/conf/cassandra.yaml
@@ -248,7 +248,7 @@ concurrent_writes: 32
 
 # Total memory to use for memtables.  Cassandra will flush the largest
 # memtable when this much memory is used.
-# If omitted, Cassandra will set it to 1/3 of the heap.
+# If omitted, Cassandra will set it to 1/4 of the heap.
 # memtable_total_space_in_mb: 2048
 
 # Total space to use for commitlogs.  Since commitlog segments are