diff --git a/debian/alternc.config b/debian/alternc.config
index 4b33c591..2784ed09 100644
--- a/debian/alternc.config
+++ b/debian/alternc.config
@@ -248,10 +248,8 @@ while [ "$QUEST_STATE" != 0 -a "$QUEST_STATE" != 14 ]; do
     touch "$aclcheckfile"
     setfacl -m u:root:rwx "$aclcheckfile" 2>/dev/null || (
       test -e "$aclcheckfile" && rm -f "$aclcheckfile" || true
-      db_input critical alternc/acluninstalled || true
-      db_go
-      db_reset alternc/acluninstalled || true
-      db_fset alternc/acluninstalled "seen" "false" || true
+      db_input high alternc/acluninstalled || true
+      db_go || true
       exit 2
     )
     test -e "$aclcheckfile" && rm -f "$aclcheckfile" || true
diff --git a/debian/alternc.templates b/debian/alternc.templates
index 49fa3317..53e45640 100644
--- a/debian/alternc.templates
+++ b/debian/alternc.templates
@@ -1,11 +1,14 @@
 Template: alternc/acluninstalled
-Type: note
+Type: error
 _Description: AlternC need ACL on filesystem
  AlternC can't work without ACL activated on its filesystem.
  ACL are currently not enabled.
  .
  Also, you need to activate group quota (grpquota)
  to be able to use disk quota (but that's not mandatory).
+ .
+ This is a fatal error and will cause the package installation
+ to fail.
 
 Template: alternc/quotauninstalled
 Type: note