diff --git a/common/constants.h b/common/constants.h
index 1be22de..ddf7df5 100644
--- a/common/constants.h
+++ b/common/constants.h
@@ -49,6 +49,7 @@
 extern const char kPrefsManifestSignatureSize[];
 extern const char kPrefsMetricsAttemptLastReportingTime[];
 extern const char kPrefsMetricsCheckLastReportingTime[];
+extern const char kPrefsNoIgnoreBackoff[];
 extern const char kPrefsNumReboots[];
 extern const char kPrefsNumResponsesSeen[];
 extern const char kPrefsOmahaCohort[];