diff --git a/jupyter_notebook/static/notebook/js/cell.js b/jupyter_notebook/static/notebook/js/cell.js
index 4e34e2eec..3f9e4e306 100644
--- a/jupyter_notebook/static/notebook/js/cell.js
+++ b/jupyter_notebook/static/notebook/js/cell.js
@@ -76,7 +76,7 @@ define([
         // backward compat.
         Object.defineProperty(this, 'cm_config', {
             get: function() {
-                console.warn("warning you are accessing a deprecated field")
+                console.warn("Warning: accessing Cell.cm_config directly is deprecate.")
                 return that._options.cm_config;
             },
         });