diff --git a/make/proj.mk.in b/make/proj.mk.in
index 58bff050..fac88131 100644
--- a/make/proj.mk.in
+++ b/make/proj.mk.in
@@ -4,7 +4,7 @@
 # $Id$
 
 PROJECT := ytools
-TOPDIR = $(MODDIR)
+MODDIR = $(TOPDIR)
 
 REQUIRED = inst/pre \
 		make \