diff --git a/drivers/timer/stm32_lptim_timer.c b/drivers/timer/stm32_lptim_timer.c
index 568d636823c..af4b113cff8 100644
--- a/drivers/timer/stm32_lptim_timer.c
+++ b/drivers/timer/stm32_lptim_timer.c
@@ -128,6 +128,11 @@ int sys_clock_driver_init(const struct device *dev)
 		    lptim_irq_handler, 0, 0);
 	irq_enable(DT_IRQN(DT_NODELABEL(lptim1)));
 
+#ifdef CONFIG_SOC_SERIES_STM32WLX
+	/* Enable the LPTIM1 wakeup EXTI line */
+	LL_EXTI_EnableIT_0_31(LL_EXTI_LINE_29);
+#endif
+
 	/* configure the LPTIM1 counter */
 	LL_LPTIM_SetClockSource(LPTIM1, LL_LPTIM_CLK_SOURCE_INTERNAL);
 	/* configure the LPTIM1 prescaler with 1 */
diff --git a/dts/arm/st/wl/stm32wl.dtsi b/dts/arm/st/wl/stm32wl.dtsi
index f4cc1fc83ce..e4029860583 100644
--- a/dts/arm/st/wl/stm32wl.dtsi
+++ b/dts/arm/st/wl/stm32wl.dtsi
@@ -151,6 +151,18 @@
 			};
 		};
 
+		lptim1: timers@40007c00 {
+			compatible = "st,stm32-lptim";
+			clocks = <&rcc STM32_CLOCK_BUS_APB1 0x80000000>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <0x40007c00 0x400>;
+			interrupts = <39 0>;
+			interrupt-names = "wakeup";
+			status = "disabled";
+			label = "LPTIM_1";
+		};
+
 		rtc: rtc@40002800 {
 			compatible = "st,stm32-rtc";
 			reg = <0x40002800 0x400>;