diff --git a/src/Nazara/Utility/X11/WindowImpl.hpp b/src/Nazara/Utility/X11/WindowImpl.hpp
index 670f0af4f..414140179 100644
--- a/src/Nazara/Utility/X11/WindowImpl.hpp
+++ b/src/Nazara/Utility/X11/WindowImpl.hpp
@@ -114,6 +114,7 @@ namespace Nz
 			bool m_ownsWindow;
 			bool m_smoothScrolling;
 			bool m_threadActive;
+			short m_scrolling;
 			Vector2i m_mousePos;
 			bool m_keyRepeat;