diff --git a/debian/alternc.postinst b/debian/alternc.postinst
index 44990296..f7dffafe 100644
--- a/debian/alternc.postinst
+++ b/debian/alternc.postinst
@@ -63,7 +63,7 @@ case "$1" in
     chmod g+rxw "$VMAIL_HOME" 
     chmod g+rxw "$VMAIL_HOME"/* 2>/dev/null || true # It may be empty
 
-    chown alterncpanel.alterncpanel "/var/lib/alternc/panel"
+    chown alterncpanel:alterncpanel "/var/lib/alternc/panel"
 
     # build local.sh if it does not exist
     if [ ! -f $CONFIGFILE ]; then