diff --git a/constants.cc b/constants.cc
index eec9144..b68bd04 100644
--- a/constants.cc
+++ b/constants.cc
@@ -75,4 +75,4 @@
 const char kPrefsUrlSwitchCount[] = "url-switch-count";
 const char kPrefsWallClockWaitPeriod[] = "wall-clock-wait-period";
 
-}
+}  // namespace chromeos_update_engine