diff --git a/src/controller.cpp b/src/controller.cpp
index f9c93b3de..d16c10b19 100644
--- a/src/controller.cpp
+++ b/src/controller.cpp
@@ -77,7 +77,7 @@ Controller::Controller(QObject *parent)
     });
 
 #ifndef Q_OS_WINDOWS
-    const auto unixExitHandler = [](int /*sig*/) -> void {
+    const auto unixExitHandler = [](int) -> void {
         QCoreApplication::quit();
     };