diff --git a/Dockerfile.bun b/Dockerfile.bun
index 5214e42a6a..22d6927434 100644
--- a/Dockerfile.bun
+++ b/Dockerfile.bun
@@ -41,8 +41,9 @@ RUN bun -e "import { Database } from 'bun:sqlite'; const db = new Database(':mem
 
 COPY . .
 
-# Disable Turbopack for Bun builder stage (Turbopack V8 internal worker bindings require Node)
-ENV OMNIROUTE_USE_TURBOPACK=0
+# Turbopack is supported on Bun 1.4 + Next 16.3; override via --build-arg OMNIROUTE_USE_TURBOPACK=0 if needed
+ARG OMNIROUTE_USE_TURBOPACK=1
+ENV OMNIROUTE_USE_TURBOPACK=${OMNIROUTE_USE_TURBOPACK}
 
 ARG OMNIROUTE_BASE_PATH=""
 ENV OMNIROUTE_BASE_PATH=$OMNIROUTE_BASE_PATH
diff --git a/changelog.d/features/11471-bun-turbopack.md b/changelog.d/features/11471-bun-turbopack.md
new file mode 100644
index 0000000000..69c5c8db05
--- /dev/null
+++ b/changelog.d/features/11471-bun-turbopack.md
@@ -0,0 +1 @@
+- **build(bun):** allow Turbopack bundler flag on Bun 1.4+ with configurable Webpack fallback ([#11471](https://github.com/diegosouzapw/OmniRoute/pull/11471)) — thanks @TheDemonTuan
diff --git a/scripts/build/build-next-isolated.mjs b/scripts/build/build-next-isolated.mjs
index fa58607ff5..b1bc79e567 100644
--- a/scripts/build/build-next-isolated.mjs
+++ b/scripts/build/build-next-isolated.mjs
@@ -131,9 +131,9 @@ function runNextBuild() {
 }
 
 export function resolveNextBuildBundlerFlag(baseEnv = process.env) {
-  // Turbopack is the default on Node.js; on Bun or when explicitly disabled (=0),
-  // use Webpack (--webpack) to avoid Turbopack V8 internal worker API mismatches.
-  if (process.versions.bun || baseEnv.OMNIROUTE_USE_TURBOPACK === "0") {
+  // Turbopack is the default (on Node.js and Bun 1.4+).
+  // When explicitly disabled (OMNIROUTE_USE_TURBOPACK=0), use Webpack (--webpack) as fallback.
+  if (baseEnv.OMNIROUTE_USE_TURBOPACK === "0") {
     return "--webpack";
   }
   return "--turbopack";
diff --git a/tests/unit/build/resolve-next-build-bundler-flag.test.mjs b/tests/unit/build/resolve-next-build-bundler-flag.test.mjs
new file mode 100644
index 0000000000..a378193466
--- /dev/null
+++ b/tests/unit/build/resolve-next-build-bundler-flag.test.mjs
@@ -0,0 +1,19 @@
+import { test } from "node:test";
+import assert from "node:assert/strict";
+
+import { resolveNextBuildBundlerFlag } from "../../../scripts/build/build-next-isolated.mjs";
+
+test("resolveNextBuildBundlerFlag returns --turbopack by default", () => {
+  const flag = resolveNextBuildBundlerFlag({});
+  assert.equal(flag, "--turbopack");
+});
+
+test("resolveNextBuildBundlerFlag returns --webpack when OMNIROUTE_USE_TURBOPACK is '0'", () => {
+  const flag = resolveNextBuildBundlerFlag({ OMNIROUTE_USE_TURBOPACK: "0" });
+  assert.equal(flag, "--webpack");
+});
+
+test("resolveNextBuildBundlerFlag returns --turbopack when OMNIROUTE_USE_TURBOPACK is '1'", () => {
+  const flag = resolveNextBuildBundlerFlag({ OMNIROUTE_USE_TURBOPACK: "1" });
+  assert.equal(flag, "--turbopack");
+});