diff --git a/prefs_interface.h b/prefs_interface.h
index 724651e..a9b20a5 100644
--- a/prefs_interface.h
+++ b/prefs_interface.h
@@ -12,6 +12,11 @@
 extern const char kPrefsDeltaUpdateFailures[];
 extern const char kPrefsLastActivePingDay[];
 extern const char kPrefsLastRollCallPingDay[];
+extern const char kPrefsManifestMetadataSize[];
+extern const char kPrefsUpdateCheckResponseHash[];
+extern const char kPrefsUpdateStateNextDataOffset[];
+extern const char kPrefsUpdateStateNextOperation[];
+extern const char kPrefsUpdateStateSignedSHA256Context[];
 
 // The prefs interface allows access to a persistent preferences
 // store. The two reasons for providing this as an interface are