diff --git a/apps/server/src/projectFaviconRoute.test.ts b/apps/server/src/projectFaviconRoute.test.ts
index a346e513eb..03d9893fff 100644
--- a/apps/server/src/projectFaviconRoute.test.ts
+++ b/apps/server/src/projectFaviconRoute.test.ts
@@ -117,6 +117,25 @@ describe("tryHandleProjectFaviconRequest", () => {
     });
   });
 
+  it("serves jpeg icons discovered from source metadata with the correct content type", async () => {
+    const projectDir = makeTempDir("t3code-favicon-route-jpeg-");
+    const iconPath = path.join(projectDir, "public", "brand", "logo.jpeg");
+    fs.mkdirSync(path.dirname(iconPath), { recursive: true });
+    fs.writeFileSync(
+      path.join(projectDir, "index.html"),
+      '<link rel="icon" href="/brand/logo.jpeg">',
+    );
+    fs.writeFileSync(iconPath, "jpeg-favicon", "utf8");
+
+    await withRouteServer(async (baseUrl) => {
+      const pathname = `/api/project-favicon?cwd=${encodeURIComponent(projectDir)}`;
+      const response = await request(baseUrl, pathname);
+      expect(response.statusCode).toBe(200);
+      expect(response.contentType).toContain("image/jpeg");
+      expect(response.body).toBe("jpeg-favicon");
+    });
+  });
+
   it("resolves icon link when href appears before rel in HTML", async () => {
     const projectDir = makeTempDir("t3code-favicon-route-html-order-");
     const iconPath = path.join(projectDir, "public", "brand", "logo.svg");
diff --git a/apps/server/src/projectFaviconRoute.ts b/apps/server/src/projectFaviconRoute.ts
index cf234ad894..895693e962 100644
--- a/apps/server/src/projectFaviconRoute.ts
+++ b/apps/server/src/projectFaviconRoute.ts
@@ -5,6 +5,7 @@ import path from "node:path";
 const FAVICON_MIME_TYPES: Record<string, string> = {
   ".png": "image/png",
   ".jpg": "image/jpeg",
+  ".jpeg": "image/jpeg",
   ".svg": "image/svg+xml",
   ".ico": "image/x-icon",
 };