diff --git a/libnfc/buses/Makefile.am b/libnfc/buses/Makefile.am
index 23cf46f..58f193c 100644
--- a/libnfc/buses/Makefile.am
+++ b/libnfc/buses/Makefile.am
@@ -1,10 +1,21 @@
-
 # set the include path found by configure
 AM_CPPFLAGS = $(all_includes) $(LIBNFC_CFLAGS)
 
 noinst_LTLIBRARIES = libnfcbuses.la
-libnfcbuses_la_SOURCES = uart.c uart.h usbbus.c usbbus.h
-libnfcbuses_la_CFLAGS = -I$(top_srcdir)/libnfc
 
+libnfcbuses_la_SOURCES = 
+libnfcbuses_la_CFLAGS = -I$(top_srcdir)/libnfc
+libnfcbuses_la_LIBADD = 
+
+# UART_ENABLED
+libnfcbuses_la_SOURCES += uart.c uart.h
+libnfcbuses_la_CFLAGS +=
+libnfcbuses_la_LIBADD +=
 EXTRA_DIST = uart_posix.c uart_win32.c
 
+if LIBUSB_ENABLED
+  libnfcbuses_la_SOURCES += usbbus.c usbbus.h
+  libnfcbuses_la_CFLAGS += @libusb_CFLAGS@
+  libnfcbuses_la_LIBADD  += @libusb_LIBS@
+endif
+