diff --git a/MagickCore/pixel.h b/MagickCore/pixel.h
index d607a30..6c945e0 100644
--- a/MagickCore/pixel.h
+++ b/MagickCore/pixel.h
@@ -47,7 +47,7 @@
   ReadMaskChannel = 0x0040,          /* Pixel is Not Readable? */
   WriteMaskChannel = 0x0080,         /* Pixel is Write Protected? */
   MetaChannel = 0x0100,              /* ???? */
-  CompositeChannels = 0x002F,
+  CompositeChannels = MaxPixelChannels,
   AllChannels = 0x7ffffff,
   /*
     Special purpose channel types.