diff --git a/prefs_interface.h b/prefs_interface.h
index 66fe8cb..81aa770 100644
--- a/prefs_interface.h
+++ b/prefs_interface.h
@@ -13,6 +13,7 @@
 extern const char kPrefsLastActivePingDay[];
 extern const char kPrefsLastRollCallPingDay[];
 extern const char kPrefsManifestMetadataSize[];
+extern const char kPrefsResumedUpdateFailures[];
 extern const char kPrefsUpdateCheckResponseHash[];
 extern const char kPrefsUpdateStateNextDataOffset[];
 extern const char kPrefsUpdateStateNextOperation[];