diff --git a/src/libs/advanceddockingsystem/linux/floatingwidgettitlebar.cpp b/src/libs/advanceddockingsystem/linux/floatingwidgettitlebar.cpp
index 27bc1a794d1..64e71a3b1c3 100644
--- a/src/libs/advanceddockingsystem/linux/floatingwidgettitlebar.cpp
+++ b/src/libs/advanceddockingsystem/linux/floatingwidgettitlebar.cpp
@@ -51,7 +51,7 @@ class FloatingWidgetTitleBarPrivate
 public:
     FloatingWidgetTitleBar *q; ///< public interface class
     QLabel *m_iconLabel = nullptr;
-    TabLabelType *m_titleLabel;
+    TabLabelType *m_titleLabel = nullptr;
     tCloseButton *m_closeButton = nullptr;
     FloatingDockContainer *m_floatingWidget = nullptr;
     eDragState m_dragState = DraggingInactive;