diff --git a/debian/dovecot-keylookupd.postinst b/debian/dovecot-keylookupd.postinst
index 5c22785fc040adcf7fa7bbd2bd91286fcb75019a..2b5666d90eddfb180d1c672ab724cf04f00852f6 100755
--- a/debian/dovecot-keylookupd.postinst
+++ b/debian/dovecot-keylookupd.postinst
@@ -7,7 +7,8 @@ configure)
     addgroup --system --quiet dovecot-keylookupd
     adduser --system --no-create-home --home /run/dovecot-keylookupd \
       --disabled-password --disabled-login \
-      --quiet --ingroup dovecot-keylookupd dovecot-keylookupd
+      --quiet --ingroup dovecot-keylookupd dovecot-keylookupd \
+      || true
     ;;
 esac