diff --git a/src/create-runtime-tmux-config.test.ts b/src/create-runtime-tmux-config.test.ts
index efc03fa4a..cb3604892 100644
--- a/src/create-runtime-tmux-config.test.ts
+++ b/src/create-runtime-tmux-config.test.ts
@@ -1,6 +1,10 @@
 /// <reference types="bun-types" />
 
 import { describe, expect, test } from "bun:test"
+import { spawnSync } from "node:child_process"
+import { mkdtempSync, rmSync } from "node:fs"
+import { tmpdir } from "node:os"
+import { join } from "node:path"
 
 import { TmuxConfigSchema } from "./config/schema/tmux"
 import { createRuntimeTmuxConfig } from "./create-runtime-tmux-config"
@@ -14,4 +18,40 @@ describe("createRuntimeTmuxConfig", () => {
       expect(runtimeTmuxConfig.isolation).toBe(schemaDefault)
     })
   })
+
+  describe("#given the runtime does not expose Bun", () => {
+    test("#when interactive bash availability is checked from a bundled module #then it returns false without crashing", async () => {
+      const outdir = mkdtempSync(join(tmpdir(), "omo-desktop-runtime-"))
+
+      try {
+        const build = await Bun.build({
+          entrypoints: [join(import.meta.dir, "create-runtime-tmux-config.ts")],
+          outdir,
+          target: "bun",
+          format: "esm",
+        })
+        expect(build.success).toBe(true)
+
+        const result = spawnSync(Bun.which("node") ?? "node", [
+          "--input-type=module",
+          "-e",
+          `import { pathToFileURL } from "node:url";
+const mod = await import(pathToFileURL(process.env.MODULE_PATH).href);
+console.log(String(mod.isInteractiveBashEnabled()));`,
+        ], {
+          env: {
+            ...process.env,
+            MODULE_PATH: join(outdir, "create-runtime-tmux-config.js"),
+          },
+          encoding: "utf8",
+        })
+
+        expect(result.stderr).toBe("")
+        expect(result.status).toBe(0)
+        expect(result.stdout.trim()).toBe("false")
+      } finally {
+        rmSync(outdir, { recursive: true, force: true })
+      }
+    })
+  })
 })
diff --git a/src/create-runtime-tmux-config.ts b/src/create-runtime-tmux-config.ts
index 937fc4b14..8e41ef6cf 100644
--- a/src/create-runtime-tmux-config.ts
+++ b/src/create-runtime-tmux-config.ts
@@ -1,6 +1,16 @@
 import type { OhMyOpenCodeConfig, TmuxConfig } from "./config"
 import { TmuxConfigSchema } from "./config/schema/tmux"
 
+type RuntimeWithBun = typeof globalThis & {
+  Bun?: {
+    which(binary: string): string | null
+  }
+}
+
+function defaultWhich(binary: string): string | null {
+  return (globalThis as RuntimeWithBun).Bun?.which(binary) ?? null
+}
+
 export function isTmuxIntegrationEnabled(
   pluginConfig: { tmux?: { enabled?: boolean } | undefined },
 ): boolean {
@@ -8,7 +18,7 @@ export function isTmuxIntegrationEnabled(
 }
 
 export function isInteractiveBashEnabled(
-  which: (binary: string) => string | null = Bun.which,
+  which: (binary: string) => string | null = defaultWhich,
 ): boolean {
   return which("tmux") !== null
 }