diff --git a/MagickCore/option.c b/MagickCore/option.c
index 8a0fe5b..7b077e4 100644
--- a/MagickCore/option.c
+++ b/MagickCore/option.c
@@ -104,8 +104,8 @@
     { "Discrete", DiscreteAlphaChannel, UndefinedOptionFlag, MagickFalse },
     { "Disassociate", DisassociateAlphaChannel, UndefinedOptionFlag, MagickFalse },
     { "Extract", ExtractAlphaChannel, UndefinedOptionFlag, MagickFalse },
-    { "Off", DeactivateAlphaChannel, UndefinedOptionFlag, MagickFalse },
-    { "On", ActivateAlphaChannel, UndefinedOptionFlag, MagickFalse },
+    { "Off", OffAlphaChannel, UndefinedOptionFlag, MagickFalse },
+    { "On", OnAlphaChannel, UndefinedOptionFlag, MagickFalse },
     { "Opaque", OpaqueAlphaChannel, UndefinedOptionFlag, MagickFalse },
     { "Remove", RemoveAlphaChannel, UndefinedOptionFlag, MagickFalse },
     { "Set", SetAlphaChannel, UndefinedOptionFlag, MagickFalse },