--- ./drivers/Makefile.am.orig
+++ ./drivers/Makefile.am
@@ -180,7 +180,7 @@
 tripplite_usb_LDADD = $(LDADD_DRIVERS) $(LIBUSB_LIBS) -lm
 
 bcmxcp_usb_SOURCES = bcmxcp_usb.c bcmxcp.c usb-common.c
-bcmxcp_usb_LDADD = $(LDADD_DRIVERS) $(LIBUSB_LIBS)
+bcmxcp_usb_LDADD = $(LDADD_DRIVERS) $(LIBUSB_LIBS) -lm
 
 blazer_usb_SOURCES = blazer.c blazer_usb.c libusb.c usb-common.c
 blazer_usb_LDADD = $(LDADD_DRIVERS) $(LIBUSB_LIBS) -lm