diff --git a/app/src/processing/app/Sketch.java b/app/src/processing/app/Sketch.java
index 33c803ecc..98e55bd88 100644
--- a/app/src/processing/app/Sketch.java
+++ b/app/src/processing/app/Sketch.java
@@ -749,7 +749,8 @@ public class Sketch {
     if (Base.isMacOS()) {
       // http://developer.apple.com/qa/qa2001/qa1146.html
       Object modifiedParam = modified ? Boolean.TRUE : Boolean.FALSE;
-      editor.getRootPane().putClientProperty("windowModified", modifiedParam);
+      // https://developer.apple.com/library/mac/technotes/tn2007/tn2196.html#WINDOW_DOCUMENTMODIFIED
+      editor.getRootPane().putClientProperty("Window.documentModified", modifiedParam);
     }
   }
 
diff --git a/todo.txt b/todo.txt
index d9f249bb2..7adb7561b 100644
--- a/todo.txt
+++ b/todo.txt
@@ -37,6 +37,8 @@ o check on why 2x core.jar inside the Java folder
 o   maybe OS X Java can't look in subfolders? (just auto-adds things)
 o   https://github.com/processing/processing/issues/2344
 X   one is used by the PDE, the other is used as a library
+X get 'modified' indicator working on document windows again
+X   https://github.com/processing/processing/issues/2194
 _ changing the mode on an untitled, unmodified sketch removes untitled status
 _ when renaming a tab, include the previous name to be edited