diff --git a/roles/mailman/tasks/main.yml b/roles/mailman/tasks/main.yml
index 163f94fe6a..75619c1ec5 100644
--- a/roles/mailman/tasks/main.yml
+++ b/roles/mailman/tasks/main.yml
@@ -225,7 +225,7 @@
   - restart postfix
 
 - name: create the postfix aliases
-  command: sudo -u mailman mailman3 aliases
+  command: su mailman -s /bin/sh -c "mailman3 aliases"
            creates=/var/lib/mailman3/data/postfix_lmtp.db
 
 # Memcached