diff --git a/lib/lm4f/Makefile b/lib/lm4f/Makefile
index 66d1af1f..1436dede 100644
--- a/lib/lm4f/Makefile
+++ b/lib/lm4f/Makefile
@@ -44,7 +44,7 @@ OBJS += uart.o
 OBJS += vector.o
 
 OBJS += usb.o usb_control.o usb_standard.o usb_msc.o
-OBJS += usb_hid.o
+OBJS += usb_hid.o usb_bos.o usb_microsoft.o
 OBJS += usb_audio.o usb_cdc.o usb_midi.o
 OBJS += usb_lm4f.o