diff --git a/src/core/Action.js b/src/core/Action.js
index cc1efdf9f..f65c2a44e 100644
--- a/src/core/Action.js
+++ b/src/core/Action.js
@@ -5,21 +5,7 @@
 
 import { EventEmitter } from 'eventemitter3';
 import Ros from '../core/Ros.js';
-
-/**
- * An "enumeration" for goal statuses.
- * This is directly based on the action_msgs/GoalStatus ROS message:
- * https://docs.ros2.org/latest/api/action_msgs/msg/GoalStatus.html
- */
-const GoalStatus = Object.freeze({
-  STATUS_UNKNOWN: 0,
-  STATUS_ACCEPTED: 1,
-  STATUS_EXECUTING: 2,
-  STATUS_CANCELING: 3,
-  STATUS_SUCCEEDED: 4,
-  STATUS_CANCELED: 5,
-  STATUS_ABORTED: 6
-});
+import { GoalStatus } from '../core/GoalStatus.ts'
 
 /**
  * A ROS 2 action client.
diff --git a/src/core/GoalStatus.ts b/src/core/GoalStatus.ts
new file mode 100644
index 000000000..7b2a3cd11
--- /dev/null
+++ b/src/core/GoalStatus.ts
@@ -0,0 +1,14 @@
+/**
+ * An enumeration for goal statuses.
+ * This is directly based on the action_msgs/GoalStatus ROS message:
+ * https://docs.ros2.org/latest/api/action_msgs/msg/GoalStatus.html
+ */
+export enum GoalStatus {
+    STATUS_UNKNOWN = 0,
+    STATUS_ACCEPTED = 1,
+    STATUS_EXECUTING = 2,
+    STATUS_CANCELING = 3,
+    STATUS_SUCCEEDED = 4,
+    STATUS_CANCELED = 5,
+    STATUS_ABORTED = 6
+}
diff --git a/tsconfig.json b/tsconfig.json
index f462b1b0c..7ffadcc31 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -5,6 +5,7 @@
     "rootDir": "./src" /* Specify the root folder within your source files. */,
     "allowJs": true /* Allow JavaScript files to be a part of your program. Use the 'checkJS' option to get errors from these files. */,
     "checkJs": true /* Enable error reporting in type-checked JavaScript files. */,
+    "allowImportingTsExtensions": true /* Enable importing TypeScript files. */,
     "declaration": true /* Generate .d.ts files from TypeScript and JavaScript files in your project. */,
     "outDir": "./tsbuild" /* Specify an output folder for all emitted files. */,
     "declarationDir": "./build" /* Specify the output directory for generated declaration files. */,