diff --git a/source/Irrlicht/MacOSX/CIrrDeviceMacOSX.mm b/source/Irrlicht/MacOSX/CIrrDeviceMacOSX.mm
index 60da342..6bf2e30 100644
--- a/source/Irrlicht/MacOSX/CIrrDeviceMacOSX.mm
+++ b/source/Irrlicht/MacOSX/CIrrDeviceMacOSX.mm
@@ -642,7 +642,7 @@ long GetDictionaryLong(CFDictionaryRef theDict, const void* key)
 						NSOpenGLPFASamples, (NSOpenGLPixelFormatAttribute)CreationParams.AntiAlias,
 						NSOpenGLPFAStencilSize, (NSOpenGLPixelFormatAttribute)(CreationParams.Stencilbuffer?1:0),
 						NSOpenGLPFADoubleBuffer,
-						(NSOpenGLPixelFormatAttribute)nil
+						(NSOpenGLPixelFormatAttribute)0
 					};
 
 					if (CreationParams.AntiAlias<2)
@@ -668,7 +668,7 @@ long GetDictionaryLong(CFDictionaryRef theDict, const void* key)
 						{
 							// Third try without Doublebuffer
 							os::Printer::log("No doublebuffering available.", ELL_WARNING);
-							windowattribs[14]=(NSOpenGLPixelFormatAttribute)nil;
+							windowattribs[14]=(NSOpenGLPixelFormatAttribute)0;
 						}
 
 						format = [[NSOpenGLPixelFormat alloc] initWithAttributes:windowattribs];