diff --git a/boards/nordic/nrf54l15dk/nrf54l15_cpuapp_common.dtsi b/boards/nordic/nrf54l15dk/nrf54l15_cpuapp_common.dtsi
index 191babb632f..4292e9a1523 100644
--- a/boards/nordic/nrf54l15dk/nrf54l15_cpuapp_common.dtsi
+++ b/boards/nordic/nrf54l15dk/nrf54l15_cpuapp_common.dtsi
@@ -87,6 +87,7 @@
 
 &uart20 {
 	status = "okay";
+	hw-flow-control;
 };
 
 &gpio0 {
diff --git a/boards/nordic/nrf54l15dk/nrf54l15dk_nrf54l15_cpuflpr.dts b/boards/nordic/nrf54l15dk/nrf54l15dk_nrf54l15_cpuflpr.dts
index 472e3f2b8d3..a608941514e 100644
--- a/boards/nordic/nrf54l15dk/nrf54l15dk_nrf54l15_cpuflpr.dts
+++ b/boards/nordic/nrf54l15dk/nrf54l15dk_nrf54l15_cpuflpr.dts
@@ -48,6 +48,7 @@
 
 &uart30 {
 	status = "okay";
+	hw-flow-control;
 };
 
 &gpio0 {