diff --git a/board/amcc/taihu/lcd.c b/board/amcc/taihu/lcd.c
index 3d042df..7cc094a 100644
--- a/board/amcc/taihu/lcd.c
+++ b/board/amcc/taihu/lcd.c
@@ -140,7 +140,7 @@
 static int do_lcd_puts (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
 {
 	if (argc < 2) {
-		printf("%s", cmdtp->usage);
+		cmd_usage(cmdtp);
 		return 1;
 	}
 	lcd_puts(argv[1]);
@@ -151,7 +151,7 @@
 static int do_lcd_putc (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
 {
 	if (argc < 2) {
-		printf("%s", cmdtp->usage);
+		cmd_usage(cmdtp);
 		return 1;
 	}
 	lcd_putc((char)argv[1][0]);
@@ -166,7 +166,7 @@
 	char cur_addr;
 
 	if (argc < 3) {
-		printf("%s", cmdtp->usage);
+		cmd_usage(cmdtp);
 		return 1;
 	}