diff --git a/chap7-neo4j/friendsuggest.groovy b/chap7-neo4j/friendsuggest.groovy
index d0b9941..ee3d98f 100644
--- a/chap7-neo4j/friendsuggest.groovy
+++ b/chap7-neo4j/friendsuggest.groovy
@@ -9,6 +9,7 @@
 Gremlin.defineStep( 'friendsuggest',
   [Vertex, Pipe],
   {
+    def start
     _().sideEffect{start = it}.both('friends').
     except([start]).out('likes').dedup
   }