diff --git a/hardware_android.cc b/hardware_android.cc
index 91c3fbe..d4a6838 100644
--- a/hardware_android.cc
+++ b/hardware_android.cc
@@ -200,4 +200,14 @@
   return false;
 }
 
+bool HardwareAndroid::GetFirstActiveOmahaPingSent() const {
+  LOG(WARNING) << "STUB: Assuming first active omaha was never set.";
+  return false;
+}
+
+void HardwareChromeOS::SetFirstActiveOmahaPingSent() {
+  LOG(WARNING) << "STUB: Assuming first active omaha is never set.";
+  return;
+}
+
 }  // namespace chromeos_update_engine