diff --git a/board/xilinx/ppc440-generic/config.mk b/board/xilinx/ppc440-generic/config.mk
index 8d220da8df..6d767552dd 100644
--- a/board/xilinx/ppc440-generic/config.mk
+++ b/board/xilinx/ppc440-generic/config.mk
@@ -22,4 +22,4 @@
 # MA 02111-1307 USA
 #
 
-sinclude $(obj)/board/$(BOARDDIR)/config.tmp
+sinclude $(OBJTREE)/board/$(BOARDDIR)/config.tmp