diff --git a/platform/osx/os_osx.mm b/platform/osx/os_osx.mm
index 15885e1266c9..1d0b4905f9c5 100644
--- a/platform/osx/os_osx.mm
+++ b/platform/osx/os_osx.mm
@@ -1579,7 +1579,7 @@ static void displays_arrangement_changed(CGDirectDisplayID display_id, CGDisplay
 	// setup our display link, this will inform us when a refresh is needed
 	CVDisplayLinkCreateWithActiveCGDisplays(&displayLink);
 	CVDisplayLinkSetOutputCallback(displayLink, &DisplayLinkCallback, this);
-	CVDisplayLinkSetCurrentCGDisplayFromOpenGLContext(displayLink, context.CGLContextObj, pixelFormat.CGLPixelFormatObj);
+	CVDisplayLinkSetCurrentCGDisplayFromOpenGLContext(displayLink, static_cast<CGLContextObj>(context.CGLContextObj), static_cast<CGLPixelFormatObj>(pixelFormat.CGLPixelFormatObj));
 	CVDisplayLinkStart(displayLink);
 
 	// initialise a conditional lock object