diff --git a/ps-grammar/robotZoo/roboZoo.jsgf b/ps-grammar/robotZoo/roboZoo.jsgf
index a05f807bc7593b5017a9e2daa1149c8a559ddad9..cb0f6de084d77d701671ec2d23a8e0b55175c637 100644
--- a/ps-grammar/robotZoo/roboZoo.jsgf
+++ b/ps-grammar/robotZoo/roboZoo.jsgf
@@ -4,6 +4,6 @@ grammar ToBI_roboZoo;
 public <statement> = [tobi] (<biron> | <andi> | <leon> | <kai> ) [tobi];
 
 <biron> =  biron;
-<andi> = andi | andreas; 
+<andi> = andreas; 
 <leon> = leon;
 <kai> = kai;