diff --git a/metrics.h b/metrics.h
index 0e2656d..d95101a 100644
--- a/metrics.h
+++ b/metrics.h
@@ -316,6 +316,8 @@
   static const int kMetricFrequenciesConnectedMin;
   static const int kMetricFrequenciesConnectedNumBuckets;
 
+  static const char kMetricWiFiScanTimeInEbusyMilliseconds[];
+
   static const char kMetricPowerManagerKey[];
 
   // LinkMonitor statistics.