diff --git a/src/modules/functions.ts b/src/modules/functions.ts
index 1a72c1d..01624b8 100644
--- a/src/modules/functions.ts
+++ b/src/modules/functions.ts
@@ -86,7 +86,7 @@ export function createFunctionsModule(
     // Fetch a backend function endpoint directly.
     async fetch(path: string, init: FunctionsFetchInit = {}) {
       const normalizedPath = path.startsWith("/") ? path : `/${path}`;
-      const primaryPath = `/functions${normalizedPath}`;
+      const primaryPath = `/apps/${appId}/functions${normalizedPath}`;
 
       const headers = toHeaders(init.headers);
 
diff --git a/tests/unit/functions.test.ts b/tests/unit/functions.test.ts
index 9a55379..06e87c6 100644
--- a/tests/unit/functions.test.ts
+++ b/tests/unit/functions.test.ts
@@ -468,7 +468,7 @@ describe("Functions Module", () => {
 
     expect(fetchMock).toHaveBeenCalledTimes(1);
     expect(fetchMock).toHaveBeenCalledWith(
-      `${serverUrl}/api/functions/my_function`,
+      `${serverUrl}/api/apps/${appId}/functions/my_function`,
       expect.any(Object)
     );
   });
@@ -498,7 +498,7 @@ describe("Functions Module", () => {
     fetchMock.mockResolvedValueOnce(new Response("ok", { status: 200 }));
     await base44.functions.fetch("/my_function");
     expect(fetchMock).toHaveBeenCalledWith(
-      `${serverUrl}/api/functions/my_function`,
+      `${serverUrl}/api/apps/${appId}/functions/my_function`,
       expect.any(Object)
     );
 
@@ -506,7 +506,7 @@ describe("Functions Module", () => {
     fetchMock.mockResolvedValueOnce(new Response("ok", { status: 200 }));
     await base44.functions.fetch("my_function");
     expect(fetchMock).toHaveBeenCalledWith(
-      `${serverUrl}/api/functions/my_function`,
+      `${serverUrl}/api/apps/${appId}/functions/my_function`,
       expect.any(Object)
     );
   });