diff --git a/cellular.cc b/cellular.cc
index 1f8bfb9..e3cdcb2 100644
--- a/cellular.cc
+++ b/cellular.cc
@@ -432,7 +432,8 @@
 }
 
 void Cellular::OnConnectFailed(const Error &error) {
-  service_->SetFailure(Service::kFailureUnknown);
+  if (service_)
+    service_->SetFailure(Service::kFailureUnknown);
 }
 
 void Cellular::Disconnect(Error *error) {