diff --git a/internal/lib/android_compute_client.py b/internal/lib/android_compute_client.py
index 5608e2c..7c01d11 100755
--- a/internal/lib/android_compute_client.py
+++ b/internal/lib/android_compute_client.py
@@ -370,7 +370,7 @@
                     instance, boot_timeout_secs)
         timeout_exception = errors.DeviceBootTimeoutError(
             "Device %s did not finish on boot within timeout (%s secs)" %
-            (instance, boot_timeout_secs)),
+            (instance, boot_timeout_secs))
         utils.PollAndWait(
             func=self.CheckBoot,
             expected_return=True,