diff --git a/board/esd/plu405/Makefile b/board/esd/plu405/Makefile
index ce7876c..0e5e57a 100644
--- a/board/esd/plu405/Makefile
+++ b/board/esd/plu405/Makefile
@@ -28,7 +28,10 @@
 
 LIB	= $(obj)lib$(BOARD).a
 
-COBJS	= $(BOARD).o flash.o ../common/misc.o ../common/auto_update.o
+COBJS	= $(BOARD).o flash.o \
+	../common/misc.o \
+	../common/esd405ep_nand.o \
+	../common/auto_update.o
 
 SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
 OBJS	:= $(addprefix $(obj),$(COBJS))