diff --git a/group_vars/all.sample b/group_vars/all.sample
index 057f88488..729ce2259 100644
--- a/group_vars/all.sample
+++ b/group_vars/all.sample
@@ -243,7 +243,7 @@ dummy:
 
 ## OSD options
 #
-#journal_size: 0
+#journal_size: 0 # OSD journal size in MB
 #public_network: 0.0.0.0/0
 #cluster_network: "{{ public_network }}"
 #osd_mkfs_type: xfs