diff --git a/src/plugins/qtsupport/externaleditors.cpp b/src/plugins/qtsupport/externaleditors.cpp
index 371623f6cf7..47200a6aeb3 100644
--- a/src/plugins/qtsupport/externaleditors.cpp
+++ b/src/plugins/qtsupport/externaleditors.cpp
@@ -118,12 +118,6 @@ static QString locateBinary(const QString &path, const QString &binary)
     return {};
 }
 
-static QString msgStartFailed(const QString &binary, QStringList arguments)
-{
-    arguments.push_front(binary);
-    return Tr::tr("Unable to start \"%1\"").arg(arguments.join(QLatin1Char(' ')));
-}
-
 static QString designerBinary(const QtSupport::QtVersion *qtVersion)
 {
     if (qtVersion)
@@ -227,12 +221,11 @@ static bool startEditorProcess(const LaunchData &data, QString *errorMessage)
 {
     if (debug)
         qDebug() << Q_FUNC_INFO << '\n' << data.binary << data.arguments << data.workingDirectory;
-    qint64 pid = 0;
-    if (!Process::startDetached({FilePath::fromString(data.binary), data.arguments}, data.workingDirectory, &pid)) {
-        *errorMessage = msgStartFailed(data.binary, data.arguments);
-        return false;
-    }
-    return true;
+    const CommandLine cmd{FilePath::fromString(data.binary), data.arguments};
+    if (Process::startDetached(cmd, data.workingDirectory))
+        return true;
+    *errorMessage = Tr::tr("Unable to start \"%1\".").arg(cmd.toUserOutput());
+    return false;
 }
 
 // ExternalDesignerEditorFactory with Designer Tcp remote control.