diff --git a/vars/default_vars.yml b/vars/default_vars.yml
index f61e53291..c13027222 100644
--- a/vars/default_vars.yml
+++ b/vars/default_vars.yml
@@ -240,10 +240,10 @@ idmgr_enables: False
 
 calibre_install: True
 calibre_enabled: True
-# Force installation of a later Calibre (set by vars/raspbian-9.yml)
+# Try .deb upgrade of Calibre (vars/raspbian-9.yml overrides this)
 calibre_via_debs: False
 calibre_unstable_debs: False
-# Force installation of latest x86_64 Calibre (set by most OS's)
+# Try python x86_64 upgrade of Calibre (vars/<most-OS's>.yml override this)
 calibre_via_python: False
 # Change calibre_port to 8010 if you're using XO laptops needing above idmgr
 calibre_port: 8080