diff --git a/src/compat/event_listeners.ts b/src/compat/event_listeners.ts
index 694fe333ea..24d1df96a4 100644
--- a/src/compat/event_listeners.ts
+++ b/src/compat/event_listeners.ts
@@ -287,7 +287,7 @@ function getVideoVisibilityRef(
   stopListening : CancellationSignal
 ) : IReadOnlySharedReference<boolean> {
   const isDocVisibleRef = getDocumentVisibilityRef(stopListening);
-  let currentTimeout : number | NodeJS.Timeout | undefined;
+  let currentTimeout : number | undefined;
   const ref = new SharedReference(true, stopListening);
   stopListening.register(() => {
     clearTimeout(currentTimeout);
diff --git a/src/compat/global_scope.ts b/src/compat/global_scope.ts
index f2d00dd5ed..0d23391fba 100644
--- a/src/compat/global_scope.ts
+++ b/src/compat/global_scope.ts
@@ -1,6 +1,8 @@
 import isNode from "./is_node";
 import isWorker from "./is_worker";
 
+declare const global: typeof self;
+
 /**
  * The current environment's global object, written in such a way to maximize
  * compatibility.
diff --git a/src/core/fetchers/cdn_prioritizer.ts b/src/core/fetchers/cdn_prioritizer.ts
index 1e5e776bca..924f8a0740 100644
--- a/src/core/fetchers/cdn_prioritizer.ts
+++ b/src/core/fetchers/cdn_prioritizer.ts
@@ -56,7 +56,7 @@ export default class CdnPrioritizer extends EventEmitter<ICdnPrioritizerEvents>
      * `metadata` array which is used considerably more than the `timeouts`
      * array.
      */
-    timeouts : Array<number | NodeJS.Timeout>;
+    timeouts : number[];
   };
 
   /**
diff --git a/src/utils/request/fetch.ts b/src/utils/request/fetch.ts
index 5c8ff7aeb9..486af2cb0e 100644
--- a/src/utils/request/fetch.ts
+++ b/src/utils/request/fetch.ts
@@ -146,7 +146,7 @@ export default function fetchRequest(
     abortController.abort();
   }
 
-  let timeout : number | NodeJS.Timeout | undefined;
+  let timeout : number | undefined;
   if (options.timeout !== undefined) {
     timeout = setTimeout(() => {
       timeouted = true;
diff --git a/src/utils/request/xhr.ts b/src/utils/request/xhr.ts
index 54bd8fd504..6d708a5d85 100644
--- a/src/utils/request/xhr.ts
+++ b/src/utils/request/xhr.ts
@@ -81,7 +81,7 @@ export default function request<T>(
     const xhr = new XMLHttpRequest();
     xhr.open("GET", url, true);
 
-    let timeoutId : undefined | number | NodeJS.Timeout;
+    let timeoutId : undefined | number;
     if (timeout !== undefined) {
       xhr.timeout = timeout;