diff --git a/client/settings.cc b/client/settings.cc
index db9dface..0aa525f1 100644
--- a/client/settings.cc
+++ b/client/settings.cc
@@ -85,8 +85,8 @@ void ScopedLockedFileHandleTraits::Free(FileHandle handle) {
 #endif  // OS_FUCHSIA
 
 struct Settings::Data {
-  static const uint32_t kSettingsMagic = 'CPds';
-  static const uint32_t kSettingsVersion = 1;
+  static constexpr uint32_t kSettingsMagic = 'CPds';
+  static constexpr uint32_t kSettingsVersion = 1;
 
   enum Options : uint32_t {
     kUploadsEnabled = 1 << 0,