diff --git a/configs/ea3131/src/Makefile b/configs/ea3131/src/Makefile
index ee4468bbf9bf795ba5e659c42612964f09d5fc99..264b6902f73579b822191d533579f18662eac7f5 100755
--- a/configs/ea3131/src/Makefile
+++ b/configs/ea3131/src/Makefile
@@ -1,7 +1,7 @@
 ############################################################################
 # configs/ea3131/src/Makefile
 #
-#   Copyright (C) 2009 Gregory Nutt. All rights reserved.
+#   Copyright (C) 2009-2010 Gregory Nutt. All rights reserved.
 #   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
 #
 # Redistribution and use in source and binary forms, with or without
@@ -44,6 +44,9 @@ CSRCS		= up_boot.c up_buttons.c up_clkinit.c up_leds.c up_mem.c up_spi.c
 ifeq ($(CONFIG_EXAMPLES_NSH_ARCHINIT),y)
 CSRCS		+= up_nsh.c
 endif
+ifeq ($(CONFIG_EXAMPLE),usbstorage)
+CSRCS		+= up_usbstrg.c
+endif
 COBJS		= $(CSRCS:.c=$(OBJEXT))
 
 SRCS		= $(ASRCS) $(CSRCS)