diff --git a/src/tsconfig.json b/src/tsconfig.json
index f0b1c749..1e8230a2 100644
--- a/src/tsconfig.json
+++ b/src/tsconfig.json
@@ -24,6 +24,7 @@
   ],
   "references": [
     { "path": "./common" },
-    { "path": "./core" }
+    { "path": "./core" },
+    { "path": "./ui" }
   ]
 }
diff --git a/src/ui/Lifecycle.ts b/src/ui/Lifecycle.ts
index 9f058106..4d36a1f1 100644
--- a/src/ui/Lifecycle.ts
+++ b/src/ui/Lifecycle.ts
@@ -3,7 +3,7 @@
  * @license MIT
  */
 
-import { IDisposable } from 'xterm';
+import { IDisposable } from '../common/Types';
 
 /**
  * Adds a disposable listener to a node in the DOM, returning the disposable.
@@ -24,8 +24,6 @@ export function addDisposableDomListener(
         return;
       }
       node.removeEventListener(type, handler, useCapture);
-      node = null;
-      handler = null;
     }
   };
 }
diff --git a/src/ui/tsconfig.json b/src/ui/tsconfig.json
new file mode 100644
index 00000000..2763c6b1
--- /dev/null
+++ b/src/ui/tsconfig.json
@@ -0,0 +1,19 @@
+{
+  "extends": "../tsconfig-library-base",
+  "compilerOptions": {
+    "lib": [
+      "dom",
+      "es5",
+    ],
+    "outDir": "../../lib",
+    "types": [
+      "../../node_modules/@types/mocha"
+    ]
+  },
+  "include": [
+    "./Lifecycle.ts"
+  ],
+  "references": [
+    { "path": "../common" }
+  ]
+}  
\ No newline at end of file