diff --git a/examples/eg_protocols.pdl b/examples/eg_protocols.pdl
index 91123c5824cbe9055386b2fb4793a8b70ef16105..a545ea70afb988c8600f4cdf12f68d4e5f8c5749 100644
--- a/examples/eg_protocols.pdl
+++ b/examples/eg_protocols.pdl
@@ -1,8 +1,13 @@
+primitive pres_2(in i, out o) {
+  synchronous {
+    //put(o, get(i));
+  }
+}
 primitive together(in ia, in ib, out oa, out ob){
-  while(true) synchronous() {
+  while(true) synchronous {
     if(fires(ia)) {
       put(oa, get(ia));
       put(ob, get(ib));
     }
   }	
-}
\ No newline at end of file
+}