diff --git a/metrics.h b/metrics.h
index 5383403..d0d070c 100644
--- a/metrics.h
+++ b/metrics.h
@@ -157,6 +157,10 @@
   static const int kMetricNetworkSecurityMax;
   static const char kMetricNetworkServiceErrors[];
   static const int kMetricNetworkServiceErrorsMax;
+  static const char kMetricNetworkSignalStrength[];
+  static const int kMetricNetworkSignalStrengthMin;
+  static const int kMetricNetworkSignalStrengthMax;
+  static const int kMetricNetworkSignalStrengthNumBuckets;
   static const char kMetricTimeOnlineSeconds[];
   static const int kMetricTimeOnlineSecondsMax;
   static const int kMetricTimeOnlineSecondsMin;