diff --git a/code/ryzom/tools/client/ryzom_installer/src/utils.cpp b/code/ryzom/tools/client/ryzom_installer/src/utils.cpp
index 927b7f3b2..fc6a2ff7c 100644
--- a/code/ryzom/tools/client/ryzom_installer/src/utils.cpp
+++ b/code/ryzom/tools/client/ryzom_installer/src/utils.cpp
@@ -426,7 +426,7 @@ QString getVersionFromExecutable(const QString &path)
 	// launch executable with --version argument
 	QProcess process;
 	process.setProcessChannelMode(QProcess::MergedChannels);
-	process.start(path, QStringList() << "--version", QIODevice::ReadWrite);
+	process.start(path, QStringList() << "--version", QIODevice::ReadOnly);
 
 	if (!process.waitForStarted())
 	{