diff --git a/pdex/src/processing/mode/experimental/ASTGenerator.java b/pdex/src/processing/mode/experimental/ASTGenerator.java
index d254db7c4..ca03e7371 100644
--- a/pdex/src/processing/mode/experimental/ASTGenerator.java
+++ b/pdex/src/processing/mode/experimental/ASTGenerator.java
@@ -240,7 +240,7 @@ public class ASTGenerator {
   /**
    * Toggle AST View window
    */
-  public static final boolean SHOWAST = true;
+  public static final boolean SHOWAST = !true;
 
   protected DefaultMutableTreeNode buildAST(String source, CompilationUnit cu) {
     if (cu == null) {