diff --git a/roles/calibre/tasks/debs.yml b/roles/calibre/tasks/debs.yml
index 1410de03d..74ce6539f 100644
--- a/roles/calibre/tasks/debs.yml
+++ b/roles/calibre/tasks/debs.yml
@@ -24,7 +24,7 @@
   when: is_rpi and internet_available
 
 - name: Upgrade to latest Calibre using Debian's own .deb's from testing (rpi)
-  command: scripts/calibre-install-latest.sh       # NECESSARY since Calibre 3.24 (but libc6 will prevent boot in RPi Zero W, if calibre-install-packages.sh isn't run above!)
+  command: scripts/calibre-install-latest.sh       # NECESSARY since Calibre 3.24 (BEWARE installing libc6 will prevent boot in RPi Zero W, i.e. if calibre-install-packages.sh isn't run above!)
   when: is_rpi and internet_available
 
 - name: Upgrade to Calibre testing .deb's - target Ubuntu 16.04 (not rpi and not ubuntu_18)