diff --git a/pdex/src/processing/mode/experimental/TabOutline.java b/pdex/src/processing/mode/experimental/TabOutline.java
index bb8f75302..68a6ba8c8 100644
--- a/pdex/src/processing/mode/experimental/TabOutline.java
+++ b/pdex/src/processing/mode/experimental/TabOutline.java
@@ -57,6 +57,7 @@ public class TabOutline {
 
     int minWidth = (int) (editor.getMinimumSize().width * 0.7f), maxWidth = (int) (editor
         .getMinimumSize().width * 0.9f);
+    minWidth = Math.min(minWidth, estimateFrameWidth());
     frmOutlineView.setLayout(new BoxLayout(frmOutlineView.getContentPane(),
                                            BoxLayout.Y_AXIS));
     JPanel panelTop = new JPanel(), panelBottom = new JPanel();
@@ -278,6 +279,15 @@ public class TabOutline {
     return found;
   }
   
+  private int estimateFrameWidth() {
+    int w = 100;
+    for (int i = 0; i < editor.getSketch().getCodeCount(); i++) {
+      w = Math.max(w,
+                   editor.getSketch().getCode(i).getPrettyName().length() * 10);
+    }
+    return w;
+  }
+  
   private int estimateFrameHeight(){
     // Assuming each tree node height to be 25 pixels
     return Math.min(20 * (editor.getSketch().getCodeCount() + 1),