diff --git a/Netdisco/lib/App/Netdisco/Web/Plugin/AdminTask/Users.pm b/Netdisco/lib/App/Netdisco/Web/Plugin/AdminTask/Users.pm
index ec2f79e3..63d78405 100644
--- a/Netdisco/lib/App/Netdisco/Web/Plugin/AdminTask/Users.pm
+++ b/Netdisco/lib/App/Netdisco/Web/Plugin/AdminTask/Users.pm
@@ -16,9 +16,7 @@ register_admin_task({
 
 sub _sanity_ok {
     return 0 unless param('username')
-      and param('username') =~ m/^[[:print:]]+$/
-      and param('username') !~ m/[[:space:]]/;
-
+      and param('username') =~ m/^[[:print:] ]+$/;
     return 1;
 }