diff --git a/cluster-geo/cluster-geo.exe b/cluster-geo/cluster-geo.exe
index 7ca791afd..56b76e0d4 100755
--- a/cluster-geo/cluster-geo.exe
+++ b/cluster-geo/cluster-geo.exe
@@ -10,4 +10,4 @@ fi
 
 cd cluster-geo
 
-exec node cluster-geo.js
+exec node --harmony cluster-geo.js