diff --git a/src/bluetooth/qlowenergycontroller.cpp b/src/bluetooth/qlowenergycontroller.cpp
index e39df97c9e86bbc2c2ed8d8d5e6ef74654643568..3fb68e19c7f6a716bcaa31651dfe55c06ea5e8d1 100644
--- a/src/bluetooth/qlowenergycontroller.cpp
+++ b/src/bluetooth/qlowenergycontroller.cpp
@@ -226,6 +226,7 @@ void QLowEnergyControllerPrivate::setError(
         break;
     case QLowEnergyController::NoError:
         return;
+    default:
     case QLowEnergyController::UnknownError:
         errorString = QLowEnergyController::tr("Unknown Error");
         break;