1 files changed, 1 insertions, 1 deletions
diff --git a/J2V.java b/J2V.java
index 372f1c8..c36fa35 100644
--- a/J2V.java
+++ b/J2V.java
@@ -25,7 +25,7 @@ public class J2V {
             root.accept(new SymTableTopDown<Void>(), symt);
 
             BoilSimp vp = new BoilSimp(symt);
-            root.accept(vp, "");
+            root.accept(vp, null);
 
             PrintFilter.print("===================================================", true);
             System.out.println(vp.getVapor());