diff --git a/libnfc/buses/Makefile.am b/libnfc/buses/Makefile.am
index 58f193c..2adaf9c 100644
--- a/libnfc/buses/Makefile.am
+++ b/libnfc/buses/Makefile.am
@@ -18,4 +18,4 @@ if LIBUSB_ENABLED
   libnfcbuses_la_CFLAGS += @libusb_CFLAGS@
   libnfcbuses_la_LIBADD  += @libusb_LIBS@
 endif
-
+EXTRA_DIST += usbbus.c usbbus.h