diff --git a/src/libs/utils/synchronousprocess.cpp b/src/libs/utils/synchronousprocess.cpp
index 48948e08e11..82a57578864 100644
--- a/src/libs/utils/synchronousprocess.cpp
+++ b/src/libs/utils/synchronousprocess.cpp
@@ -373,6 +373,7 @@ SynchronousProcessResponse SynchronousProcess::run(const QString &binary,
     // event loop in that case.
     m_d->m_binary = binary;
     m_d->m_process.start(binary, args, QIODevice::ReadOnly);
+    m_d->m_process.closeWriteChannel();
     if (!m_d->m_startFailure) {
         m_d->m_timer.start();
         QApplication::setOverrideCursor(Qt::WaitCursor);
diff --git a/src/plugins/vcsbase/vcsbaseplugin.cpp b/src/plugins/vcsbase/vcsbaseplugin.cpp
index c18dfb47da7..f0b423c1ec4 100644
--- a/src/plugins/vcsbase/vcsbaseplugin.cpp
+++ b/src/plugins/vcsbase/vcsbaseplugin.cpp
@@ -798,7 +798,8 @@ static Utils::SynchronousProcessResponse
         process->setProcessChannelMode(QProcess::MergedChannels);
 
     // Start
-    process->start(binary, arguments);
+    process->start(binary, arguments, QIODevice::ReadOnly);
+    process->closeWriteChannel();
     Utils::SynchronousProcessResponse response;
     if (!process->waitForStarted()) {
         response.result = Utils::SynchronousProcessResponse::StartFailed;