diff --git a/arch/arm/boot/dts/amlogic/meson8b.dtsi b/arch/arm/boot/dts/amlogic/meson8b.dtsi
index 0876611ce26a..faf09f77c605 100644
--- a/arch/arm/boot/dts/amlogic/meson8b.dtsi
+++ b/arch/arm/boot/dts/amlogic/meson8b.dtsi
@@ -368,7 +368,7 @@ uart_ao_a_pins: uart_ao_a {
 			mux {
 				groups = "uart_tx_ao_a", "uart_rx_ao_a";
 				function = "uart_ao";
-				bias-disable;
+				bias-pull-up;
 			};
 		};
 
@@ -521,7 +521,7 @@ mux {
 				groups = "uart_tx_b0",
 				       "uart_rx_b0";
 				function = "uart_b";
-				bias-disable;
+				bias-pull-up;
 			};
 		};