diff --git a/Makefile b/Makefile
index ca527e4..5a2b577 100644
--- a/Makefile
+++ b/Makefile
@@ -13,7 +13,9 @@ SYSCLK ?= 11056
 FOSC ?=11056000L
 CFLAGS ?= -DWITH_ALT_LED9 -DWITHOUT_LEDTABLE_RELOC -DSHOW_TEMP_DATE_WEEKDAY
 
-LIBSRC = uart_init.c uart_send_chr.c uart_send_str.c
+LIBSRC = uart_init.c uart_send_chr.c uart_send_str.c \
+	 rotary_encoder_stat.c \
+	 sevenseg_dec.c sevenseg_dec_inv.c
 
 LIBOBJ =$(patsubst %.c,%.rel, $(LIBSRC))
 LIBNAME=mc8051fun.lib