diff --git a/src/cocoa_window.m b/src/cocoa_window.m
index ac22d7e3..e2f798e8 100644
--- a/src/cocoa_window.m
+++ b/src/cocoa_window.m
@@ -816,7 +816,7 @@ static GLFWbool createNativeWindow(_GLFWwindow* window,
         [window->ns.object setLevel:NSMainMenuWindowLevel + 1];
     else
     {
-        [window->ns.object center];
+        [(NSWindow*) window->ns.object center];
         _glfw.ns.cascadePoint =
             NSPointToCGPoint([window->ns.object cascadeTopLeftFromPoint:
                               NSPointFromCGPoint(_glfw.ns.cascadePoint)]);