diff --git a/target/linux/ramips/files/arch/mips/ralink/rt305x/clock.c b/target/linux/ramips/files/arch/mips/ralink/rt305x/clock.c
index 4a99cf39e2..958547611b 100644
--- a/target/linux/ramips/files/arch/mips/ralink/rt305x/clock.c
+++ b/target/linux/ramips/files/arch/mips/ralink/rt305x/clock.c
@@ -60,7 +60,7 @@ void __init rt305x_clocks_init(void)
 			break;
 		}
 		rt305x_sys_clk.rate = rt305x_cpu_clk.rate / 3;
-		rt305x_uart_clk.rate = rt305x_sys_clk.rate / 10;
+		rt305x_uart_clk.rate = 40000000;
 		rt305x_wdt_clk.rate = rt305x_sys_clk.rate;
 	} else {
 		BUG();