diff --git a/prefs_interface.h b/prefs_interface.h
index d0ff0d0..cc7c4d1 100644
--- a/prefs_interface.h
+++ b/prefs_interface.h
@@ -27,6 +27,8 @@
 extern const char kPrefsUpdateCheckCount[];
 extern const char kPrefsWallClockWaitPeriod[];
 extern const char kPrefsUpdateFirstSeenAt[];
+extern const char kPrefsCurrentResponse[];
+extern const char kPrefsCurrentUrlIndex[];
 
 // The prefs interface allows access to a persistent preferences
 // store. The two reasons for providing this as an interface are