diff --git a/common/Makefile b/common/Makefile
index 22e8a6f..482795e 100644
--- a/common/Makefile
+++ b/common/Makefile
@@ -34,6 +34,7 @@
 COBJS-y += s_record.o
 COBJS-$(CONFIG_SERIAL_MULTI) += serial.o
 COBJS-y += xyzModem.o
+COBJS-y += cmd_disk.o
 
 # core command
 COBJS-y += cmd_boot.o