diff --git a/Makefile b/Makefile
index 36eb970..1263750 100644
--- a/Makefile
+++ b/Makefile
@@ -20,7 +20,8 @@ LIBSRC = uart_init_.c uart_send_chr.c uart_send_str.c \
 	 rotary_encoder_stat.c \
 	 sevenseg_dec.c sevenseg_dec_inv.c \
 	 int_to_bcd.c getbutton.c \
-	 getpin.c setpin_lo.c setpin_hi.c setpin.c getport.c
+	 getpin.c setpin_lo.c setpin_hi.c setpin.c getport.c \
+	 long_xadd.c long_xsub.c long_xset.c long_xrlc.c long_xdiv.c
 
 LIBOBJ =$(patsubst %.c,%.rel, $(LIBSRC))
 LIBNAME=mc8051fun.lib