diff --git a/mkputty.mpw b/mkputty.mpw
index 935de1d0..390b0124 100644
--- a/mkputty.mpw
+++ b/mkputty.mpw
@@ -1,5 +1,5 @@
 Set program PuTTY
-Set makefile Makefile.mac
+Set makefile Makefile.mpw
 
 #	Run Make, then execute its output.