--- drivers/Makefile.in.orig	Thu Feb 23 19:38:14 2006
+++ drivers/Makefile.in	Thu Feb 23 19:38:43 2006
@@ -8,7 +8,7 @@
 
 # other definitions
 CC	= @CC@
-CFLAGS	= -I../include @CFLAGS@
+CFLAGS	= -I../include @CFLAGS@ @LIBUSB_CFLAGS@
 PROGS	= bestups fentonups apcsmart everups belkin masterguard powercom \
 	  cyberpower tripplite victronups genericups mge-utalk bestuferrups \
 	  isbmex etapro liebert sms esupssmart tripplitesu blazer safenet \