diff --git a/.changeset/thirty-grapes-punch.md b/.changeset/thirty-grapes-punch.md
new file mode 100644
index 000000000..fb8746e29
--- /dev/null
+++ b/.changeset/thirty-grapes-punch.md
@@ -0,0 +1,5 @@
+---
+"@opennextjs/aws": patch
+---
+
+fix(aws): add missing base path to data routes
diff --git a/packages/open-next/src/core/routing/matcher.ts b/packages/open-next/src/core/routing/matcher.ts
index 032a3a3be..8c0dabad0 100644
--- a/packages/open-next/src/core/routing/matcher.ts
+++ b/packages/open-next/src/core/routing/matcher.ts
@@ -336,7 +336,8 @@ export function fixDataPage(
   buildId: string,
 ): InternalEvent | InternalResult {
   const { rawPath, query } = internalEvent;
-  const dataPattern = `/_next/data/${buildId}`;
+  const dataPattern = `${NextConfig.basePath ?? ""}/_next/data/${buildId}`;
+
   // Return 404 for data requests that don't match the buildId
   if (rawPath.startsWith("/_next/data") && !rawPath.startsWith(dataPattern)) {
     return {
diff --git a/packages/tests-unit/tests/core/routing/matcher.test.ts b/packages/tests-unit/tests/core/routing/matcher.test.ts
index 96ff0c87e..c44a3ffc0 100644
--- a/packages/tests-unit/tests/core/routing/matcher.test.ts
+++ b/packages/tests-unit/tests/core/routing/matcher.test.ts
@@ -490,6 +490,21 @@ describe("fixDataPage", () => {
     expect(response).toEqual(event);
   });
 
+  it("should not return 404 for data requests (with base path) that don't match the buildId", () => {
+    NextConfig.basePath = "/base";
+
+    const event = createEvent({
+      url: "/base/_next/data/abc/test",
+    });
+
+    const response = fixDataPage(event, "abc");
+
+    expect(response.statusCode).not.toEqual(404);
+    expect(response).toEqual(event);
+
+    NextConfig.basePath = undefined;
+  });
+
   it("should remove json extension from data requests and add __nextDataReq to query", () => {
     const event = createEvent({
       url: "/_next/data/abc/test/file.json?hello=world",
@@ -503,4 +518,22 @@ describe("fixDataPage", () => {
       url: "/test/file?hello=world&__nextDataReq=1",
     });
   });
+
+  it("should remove json extension from data requests (with base path) and add __nextDataReq to query", () => {
+    NextConfig.basePath = "/base";
+
+    const event = createEvent({
+      url: "/base/_next/data/abc/test/file.json?hello=world",
+    });
+
+    const response = fixDataPage(event, "abc");
+
+    expect(response).toEqual({
+      ...event,
+      rawPath: "/test/file",
+      url: "/test/file?hello=world&__nextDataReq=1",
+    });
+
+    NextConfig.basePath = undefined;
+  });
 });