diff --git a/packages/babel-plugin-transform-decorators/README.md b/packages/babel-plugin-transform-decorators/README.md
index 69eaff6fbe..29f6fc8729 100644
--- a/packages/babel-plugin-transform-decorators/README.md
+++ b/packages/babel-plugin-transform-decorators/README.md
@@ -66,6 +66,8 @@ Add the following line to your .babelrc file:
 
 If you are including your plugins manually and using `transform-class-properties`, make sure that `transform-decorators` comes *before* `transform-class-properties`.
 
+Currently, `transform-class-properties` must be used in `loose` mode to support the `transform-decorators`. To use `transform-class-properties` in spec mode with decorators, wait for the next major version of decorators (Stage 2).
+
 Wrong:
 
 ```json
@@ -83,7 +85,7 @@ Right:
 {
   "plugins": [
     "transform-decorators",
-    "transform-class-properties"
+    ["transform-class-properties", { "loose" : true }]
   ]
 }
 ```
diff --git a/packages/babel-plugin-transform-decorators/src/index.js b/packages/babel-plugin-transform-decorators/src/index.js
index 05d589b5aa..6f0455cad9 100644
--- a/packages/babel-plugin-transform-decorators/src/index.js
+++ b/packages/babel-plugin-transform-decorators/src/index.js
@@ -30,7 +30,9 @@ const buildInitializerWarningHelper = template(`
     function NAME(descriptor, context){
         throw new Error(
           'Decorating class property failed. Please ensure that ' +
-          'transform-class-properties is enabled.'
+          'transform-class-properties is enabled and set to use loose mode. ' +
+          'To use transform-class-properties in spec mode with decorators, wait for ' +
+          'the next major version of decorators in stage 2.'
         );
     }
 `);