diff --git a/MagickCore/image.h b/MagickCore/image.h
index ae2765c..e17b44d 100644
--- a/MagickCore/image.h
+++ b/MagickCore/image.h
@@ -53,15 +53,15 @@
   UndefinedType,
   BilevelType,
   GrayscaleType,
-  GrayscaleMatteType,
+  GrayscaleAlphaType,
   PaletteType,
-  PaletteMatteType,
+  PaletteAlphaType,
   TrueColorType,
-  TrueColorMatteType,
+  TrueColorAlphaType,
   ColorSeparationType,
-  ColorSeparationMatteType,
+  ColorSeparationAlphaType,
   OptimizeType,
-  PaletteBilevelMatteType
+  PaletteBilevelAlphaType
 } ImageType;
 
 typedef enum