diff --git a/board/amcc/taihu/lcd.c b/board/amcc/taihu/lcd.c
index 3d042dfa73..7cc094abec 100644
--- a/board/amcc/taihu/lcd.c
+++ b/board/amcc/taihu/lcd.c
@@ -140,7 +140,7 @@ static int do_lcd_clear (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
 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_puts (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
 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 @@ static int do_lcd_cur (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
 	char cur_addr;
 
 	if (argc < 3) {
-		printf("%s", cmdtp->usage);
+		cmd_usage(cmdtp);
 		return 1;
 	}
 
diff --git a/board/amcc/taihu/taihu.c b/board/amcc/taihu/taihu.c
index 6e9330f684..a98c186a8b 100644
--- a/board/amcc/taihu/taihu.c
+++ b/board/amcc/taihu/taihu.c
@@ -102,13 +102,13 @@ static int do_led_ctl(cmd_tbl_t* cmd_tp, int flags, int argc, char *argv[])
 	int led_no;
 
 	if (argc != 3) {
-		printf("%s", cmd_tp->usage);
+		cmd_usage(cmd_tp);
 		return -1;
 	}
 
 	led_no = simple_strtoul(argv[1], NULL, 16);
 	if (led_no != 1 && led_no != 2) {
-		printf("%s", cmd_tp->usage);
+		cmd_usage(cmd_tp);
 		return -1;
 	}
 
@@ -123,7 +123,7 @@ static int do_led_ctl(cmd_tbl_t* cmd_tp, int flags, int argc, char *argv[])
 		else
 			gpio_write_bit(31, 0);
 	} else {
-		printf("%s", cmd_tp->usage);
+		cmd_usage(cmd_tp);
 		return -1;
 	}
 
diff --git a/board/amcc/taishan/lcd.c b/board/amcc/taishan/lcd.c
index 624ae40f62..4e14bbc9ae 100644
--- a/board/amcc/taishan/lcd.c
+++ b/board/amcc/taishan/lcd.c
@@ -167,7 +167,7 @@ static int do_lcd_clear(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
 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]);
@@ -176,7 +176,7 @@ static int do_lcd_puts(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
 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]);
@@ -189,7 +189,7 @@ static int do_lcd_cur(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
 	char cur_addr;
 
 	if (argc < 3) {
-		printf("%s", cmdtp->usage);
+		cmd_usage(cmdtp);
 		return 1;
 	}