diff --git a/src/main.cpp b/src/main.cpp
index 622e73c48f7bab92823aa375953a9f97f89f09ac..865b13e6d9756dded0e78053203da7965520ca47 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -121,6 +121,11 @@ main(int argc, char* argv[])
     SetProcessDPIAware();
 #endif // Q_OS_WIN
 
+#ifdef Q_OS_LINUX
+    if (!getenv("QT_QPA_PLATFORMTHEME"))
+        setenv("QT_QPA_PLATFORMTHEME", "gtk3", true);
+#endif
+
     QApplication a(newArgc, newArgv);
 
     QCoreApplication::setApplicationName("Ring");