diff --git a/src/lib/app/mainapplication.cpp b/src/lib/app/mainapplication.cpp
index 3b261e993..0f549db7c 100644
--- a/src/lib/app/mainapplication.cpp
+++ b/src/lib/app/mainapplication.cpp
@@ -1089,6 +1089,9 @@ void MainApplication::setUserStyleSheet(const QString &filePath)
         m_webProfile->scripts()->remove(oldScript);
     }
 
+    if (userCss.isEmpty())
+        return;
+
     QWebEngineScript script;
     script.setName(name);
     script.setInjectionPoint(QWebEngineScript::DocumentReady);