diff --git a/litex/soc/software/bios/readline.c b/litex/soc/software/bios/readline.c
index 48d8f1a6c..f507f1a65 100644
--- a/litex/soc/software/bios/readline.c
+++ b/litex/soc/software/bios/readline.c
@@ -150,10 +150,10 @@ void hist_init(void)
 }
 #endif
 
-static void cread_add_char(char ichar, int insert, unsigned long *num,
-			   unsigned long *eol_num, char *buf, unsigned long len)
+static void cread_add_char(char ichar, int insert, unsigned int *num,
+			   unsigned int *eol_num, char *buf, unsigned int len)
 {
-	unsigned long wlen;
+	unsigned int wlen;
 
 	if (insert || *num == *eol_num) {
 		if (*eol_num > len - 1) {
@@ -186,9 +186,9 @@ static void cread_add_char(char ichar, int insert, unsigned long *num,
 
 int readline(char *buf, int len)
 {
-	unsigned long num = 0;
-	unsigned long eol_num = 0;
-	unsigned long wlen;
+	unsigned int num = 0;
+	unsigned int eol_num = 0;
+	unsigned int wlen;
 	int insert = 1;
 	char ichar;
 
@@ -254,7 +254,7 @@ int readline(char *buf, int len)
 				wlen = eol_num - num - 1;
 				if (wlen) {
 					memmove(&buf[num], &buf[num+1], wlen);
-					putnstr(buf + num, (int)wlen);
+					putnstr(buf + num, wlen);
 				}
 
 				getcmd_putch(' ');
@@ -286,7 +286,7 @@ int readline(char *buf, int len)
 				num--;
 				memmove(buf + num, buf + num + 1, wlen);
 				getcmd_putch(CTL_BACKSPACE);
-				putnstr(buf + num, (int)wlen);
+				putnstr(buf + num, wlen);
 				getcmd_putch(' ');
 				do {
 					getcmd_putch(CTL_BACKSPACE);
@@ -298,7 +298,7 @@ int readline(char *buf, int len)
 			if (num < eol_num) {
 				wlen = eol_num - num;
 				memmove(buf + num, buf + num + 1, wlen);
-				putnstr(buf + num, (int)(wlen - 1));
+				putnstr(buf + num, wlen - 1);
 				getcmd_putch(' ');
 				do {
 					getcmd_putch(CTL_BACKSPACE);
diff --git a/litex/soc/software/bios/readline.h b/litex/soc/software/bios/readline.h
index f1284c5d1..290b2e2c0 100644
--- a/litex/soc/software/bios/readline.h
+++ b/litex/soc/software/bios/readline.h
@@ -72,7 +72,7 @@ struct esc_cmds {
 #define REFRESH_TO_EOL() {			\
 	if (num < eol_num) {			\
 		wlen = eol_num - num;		\
-		putnstr(buf + num, (int)wlen);	\
+		putnstr(buf + num, wlen);	\
 		num = eol_num;			\
 	}					\
 }