diff --git a/packages/next/src/build/utils.ts b/packages/next/src/build/utils.ts
index 7999bd21438f2..36eb8b3d54651 100644
--- a/packages/next/src/build/utils.ts
+++ b/packages/next/src/build/utils.ts
@@ -1386,6 +1386,7 @@ export async function buildAppStaticPaths({
     ComponentMod.staticGenerationAsyncStorage,
     {
       page,
+      url: undefined,
       renderOpts: {
         incrementalCache,
         supportsDynamicHTML: true,
diff --git a/packages/next/src/client/components/static-generation-async-storage.external.ts b/packages/next/src/client/components/static-generation-async-storage.external.ts
index f426f7ff8f52d..ae72c953b6ab7 100644
--- a/packages/next/src/client/components/static-generation-async-storage.external.ts
+++ b/packages/next/src/client/components/static-generation-async-storage.external.ts
@@ -19,20 +19,25 @@ export interface StaticGenerationStore {
 
   /**
    * The URL of the request. This only specifies the pathname and the search
-   * part of the URL.
+   * part of the URL. This is `undefined` when generating static paths (ie, we
+   * do not know the current URL because we're invoking the function to generate
+   * the pathnames).
    */
-  readonly url?: {
-    /**
-     * The pathname of the requested URL.
-     */
-    readonly pathname: string
-
-    /**
-     * The search part of the requested URL. If the request did not provide a
-     * search part, this will be undefined.
-     */
-    readonly search?: string
-  }
+  readonly url:
+    | {
+        /**
+         * The pathname of the requested URL.
+         */
+        readonly pathname: string
+
+        /**
+         * The search part of the requested URL. If the request did not provide a
+         * search part, this will be undefined.
+         */
+        readonly search?: string
+      }
+    | undefined
+
   readonly incrementalCache?: IncrementalCache
   readonly isOnDemandRevalidate?: boolean
   readonly isPrerendering?: boolean
diff --git a/packages/next/src/server/async-storage/static-generation-async-storage-wrapper.ts b/packages/next/src/server/async-storage/static-generation-async-storage-wrapper.ts
index 1d28c20d21736..dddc1b54ce49f 100644
--- a/packages/next/src/server/async-storage/static-generation-async-storage-wrapper.ts
+++ b/packages/next/src/server/async-storage/static-generation-async-storage-wrapper.ts
@@ -15,20 +15,23 @@ export type StaticGenerationContext = {
 
   /**
    * The URL of the request. This only specifies the pathname and the search
-   * part of the URL.
+   * part of the URL. This is only undefined when generating static paths (ie,
+   * there is no request in progress, nor do we know one).
    */
-  url?: {
-    /**
-     * The pathname of the requested URL.
-     */
-    pathname: string
+  url:
+    | {
+        /**
+         * The pathname of the requested URL.
+         */
+        pathname: string
 
-    /**
-     * The search part of the requested URL. If the request did not provide a
-     * search part, this will be an empty string.
-     */
-    search?: string
-  }
+        /**
+         * The search part of the requested URL. If the request did not provide a
+         * search part, this will be an empty string.
+         */
+        search?: string
+      }
+    | undefined
   requestEndedState?: { ended?: boolean }
   renderOpts: {
     incrementalCache?: IncrementalCache