diff --git a/vars/default_vars.yml b/vars/default_vars.yml
index c087833d4..21c796a29 100644
--- a/vars/default_vars.yml
+++ b/vars/default_vars.yml
@@ -4,6 +4,10 @@
 
 # Internet-in-a-Box (IIAB) uses True/False to indicate boolean values.
 
+# IIAB does NOT currently support uninstalling apps!  So: if any IIAB app is
+# installed with 'APP_XYZ_install: True' below, do NOT later change that.
+
+
 # IIAB (PRE-)release version number, for {{ iiab_env_file }}
 iiab_base_ver: 7.1
 iiab_revision: 0