diff --git a/src/plugins/vcsbase/vcsbaseoutputwindow.cpp b/src/plugins/vcsbase/vcsbaseoutputwindow.cpp
index 6a8cc4626a6..3ec044e271d 100644
--- a/src/plugins/vcsbase/vcsbaseoutputwindow.cpp
+++ b/src/plugins/vcsbase/vcsbaseoutputwindow.cpp
@@ -264,8 +264,9 @@ void OutputWindowPlainTextEdit::setFormat(enum VcsBaseOutputWindow::MessageStyle
 } // namespace Internal
 
 // ------------------- VcsBaseOutputWindowPrivate
-struct VcsBaseOutputWindowPrivate
+class VcsBaseOutputWindowPrivate
 {
+public:
     static VcsBaseOutputWindow *instance;
     Internal::OutputWindowPlainTextEdit *plainTextEdit();
 
diff --git a/src/plugins/vcsbase/vcsbaseoutputwindow.h b/src/plugins/vcsbase/vcsbaseoutputwindow.h
index 8e2636a2ae9..6e52b7aebd8 100644
--- a/src/plugins/vcsbase/vcsbaseoutputwindow.h
+++ b/src/plugins/vcsbase/vcsbaseoutputwindow.h
@@ -36,7 +36,7 @@
 
 namespace VcsBase {
 
-struct VcsBaseOutputWindowPrivate;
+class VcsBaseOutputWindowPrivate;
 
 class VCSBASE_EXPORT VcsBaseOutputWindow : public Core::IOutputPane
 {