diff --git a/src/engine/runtime.js b/src/engine/runtime.js
index 61f67feea..33c2803d8 100644
--- a/src/engine/runtime.js
+++ b/src/engine/runtime.js
@@ -800,6 +800,7 @@ class Runtime extends EventEmitter {
      * Create a context ("args") object for use with `formatMessage` on messages which might be target-specific.
      * @param {Target} [target] - the target to use as context. If a target is not provided, default to the current
      * editing target or the stage.
+     * @returns {object} - the context object.
      */
     makeMessageContextForTarget (target) {
         const context = {};
@@ -807,6 +808,7 @@ class Runtime extends EventEmitter {
         if (target) {
             context.targetType = (target.isStage ? TargetType.STAGE : TargetType.SPRITE);
         }
+        return context;
     }
 
     /**