diff --git a/lib/coffeescript/nodes.js b/lib/coffeescript/nodes.js
index a7b5c95107..e05419f456 100644
--- a/lib/coffeescript/nodes.js
+++ b/lib/coffeescript/nodes.js
@@ -2641,11 +2641,10 @@
       }
 
       // Add an expression to the class initializer
-
-      // NOTE Currently, only methods and static methods are valid in ES class initializers.
-      // When additional expressions become valid, this method should be updated to handle them.
       addInitializerExpression(node) {
-        if (this.validInitializerMethod(node)) {
+        if (node.unwrapAll() instanceof PassthroughLiteral) {
+          return node;
+        } else if (this.validInitializerMethod(node)) {
           return this.addInitializerMethod(node);
         } else {
           return null;
diff --git a/src/nodes.coffee b/src/nodes.coffee
index e6f1940421..a9c49ab65a 100644
--- a/src/nodes.coffee
+++ b/src/nodes.coffee
@@ -1760,11 +1760,10 @@ exports.Class = class Class extends Base
 
 
   # Add an expression to the class initializer
-  #
-  # NOTE Currently, only methods and static methods are valid in ES class initializers.
-  # When additional expressions become valid, this method should be updated to handle them.
   addInitializerExpression: (node) ->
-    if @validInitializerMethod node
+    if node.unwrapAll() instanceof PassthroughLiteral
+      node
+    else if @validInitializerMethod node
       @addInitializerMethod node
     else
       null