diff --git a/src/plugins/qtsupport/uicgenerator.cpp b/src/plugins/qtsupport/uicgenerator.cpp
index 2029d69a56e..e0cddab37d8 100644
--- a/src/plugins/qtsupport/uicgenerator.cpp
+++ b/src/plugins/qtsupport/uicgenerator.cpp
@@ -65,10 +65,9 @@ Utils::FileName UicGenerator::command() const
     return Utils::FileName::fromString(version->uicCommand());
 }
 
-void UicGenerator::handleProcessStarted(QProcess *process, const QByteArray &sourceContents)
+QStringList UicGenerator::arguments() const
 {
-    process->write(sourceContents);
-    process->closeWriteChannel();
+    return {source().toString()};
 }
 
 FileNameToContentsHash UicGenerator::handleProcessFinished(QProcess *process)
diff --git a/src/plugins/qtsupport/uicgenerator.h b/src/plugins/qtsupport/uicgenerator.h
index b0253eb73c2..115343ae950 100644
--- a/src/plugins/qtsupport/uicgenerator.h
+++ b/src/plugins/qtsupport/uicgenerator.h
@@ -41,7 +41,7 @@ public:
 
 protected:
     Utils::FileName command() const override;
-    void handleProcessStarted(QProcess *process, const QByteArray &sourceContents) override;
+    QStringList arguments() const override;
     ProjectExplorer::FileNameToContentsHash handleProcessFinished(QProcess *process) override;
 };