diff --git a/arch/arm/boot/dts/st/stih407-pinctrl.dtsi b/arch/arm/boot/dts/st/stih407-pinctrl.dtsi
index 7815669fe813..dcb821f567fa 100644
--- a/arch/arm/boot/dts/st/stih407-pinctrl.dtsi
+++ b/arch/arm/boot/dts/st/stih407-pinctrl.dtsi
@@ -462,14 +462,14 @@ pio19: pio@9209000 {
 			serial0 {
 				pinctrl_serial0: serial0-0 {
 					st,pins {
-						tx =  <&pio17 0 ALT1 OUT>;
-						rx =  <&pio17 1 ALT1 IN>;
+						tx = <&pio17 0 ALT1 OUT>;
+						rx = <&pio17 1 ALT1 IN>;
 					};
 				};
 				pinctrl_serial0_hw_flowctrl: serial0-0_hw_flowctrl {
 					st,pins {
-						tx =  <&pio17 0 ALT1 OUT>;
-						rx =  <&pio17 1 ALT1 IN>;
+						tx = <&pio17 0 ALT1 OUT>;
+						rx = <&pio17 1 ALT1 IN>;
 						cts = <&pio17 2 ALT1 IN>;
 						rts = <&pio17 3 ALT1 OUT>;
 					};