diff --git a/mkfiles.pl b/mkfiles.pl
index d141dea0..b92dcb13 100755
--- a/mkfiles.pl
+++ b/mkfiles.pl
@@ -11,7 +11,7 @@ use FileHandle;
 
 open IN, "Recipe" or die "unable to open Recipe file\n";
 
-@incdirs = ("", "unix/");
+@incdirs = ("", "unix/", "mac/");
 
 $help = ""; # list of newline-free lines of help text
 %programs = (); # maps prog name + type letter to listref of objects/resources