diff --git a/hardware_android.cc b/hardware_android.cc
index 4c5473f..5e2ee11 100644
--- a/hardware_android.cc
+++ b/hardware_android.cc
@@ -54,6 +54,7 @@
 const char kPropProductManufacturer[] = "ro.product.manufacturer";
 const char kPropBootHardwareSKU[] = "ro.boot.hardware.sku";
 const char kPropBootRevision[] = "ro.boot.revision";
+const char kPropBuildDateUTC[] = "ro.build.date.utc";
 
 // Write a recovery command line |message| to the BCB. The arguments to recovery
 // must be separated by '\n'. An empty string will erase the BCB.
@@ -199,4 +200,8 @@
   return false;
 }
 
+int64_t HardwareAndroid::GetBuildTimestamp() const {
+  return property_get_int64(kPropBuildDateUTC, 0);
+}
+
 }  // namespace chromeos_update_engine