diff --git a/platform/macos/surface.rs b/platform/macos/surface.rs
index 6d1e67f..cad74d9 100644
--- a/platform/macos/surface.rs
+++ b/platform/macos/surface.rs
@@ -36,7 +36,7 @@ local_data_key!(io_surface_repository: HashMap<IOSurfaceID,IOSurface>)
 /// The Mac native graphics metadata.
 #[deriving(Clone)]
 pub struct NativeGraphicsMetadata {
-    pixel_format: CGLPixelFormatObj,
+    pub pixel_format: CGLPixelFormatObj,
 }
 
 impl NativeGraphicsMetadata {