diff --git a/src/SFML/Window/Linux/WindowImplX11.cpp b/src/SFML/Window/Linux/WindowImplX11.cpp
index 44d52490..fd17b789 100644
--- a/src/SFML/Window/Linux/WindowImplX11.cpp
+++ b/src/SFML/Window/Linux/WindowImplX11.cpp
@@ -477,7 +477,7 @@ void WindowImplX11::initialize()
                                    XNClientWindow, m_window,
                                    XNFocusWindow,  m_window,
                                    XNInputStyle,   XIMPreeditNothing  | XIMStatusNothing,
-                                   NULL);
+                                   (void*)NULL);
     }
     else
     {