diff --git a/boards/arm/nucleo_h723zg/Kconfig.defconfig b/boards/arm/nucleo_h723zg/Kconfig.defconfig
index 7b5c327e97d..95497c20b0e 100644
--- a/boards/arm/nucleo_h723zg/Kconfig.defconfig
+++ b/boards/arm/nucleo_h723zg/Kconfig.defconfig
@@ -15,4 +15,9 @@ config NET_L2_ETHERNET
 
 endif # NETWORKING
 
+choice STM32_LPTIM_CLOCK
+	default STM32_LPTIM_CLOCK_LSE
+	depends on STM32_LPTIM_TIMER
+endchoice
+
 endif # BOARD_NUCLEO_H723ZG
diff --git a/boards/arm/nucleo_h723zg/nucleo_h723zg.dts b/boards/arm/nucleo_h723zg/nucleo_h723zg.dts
index c9d8f0fb34c..d66231e3b36 100644
--- a/boards/arm/nucleo_h723zg/nucleo_h723zg.dts
+++ b/boards/arm/nucleo_h723zg/nucleo_h723zg.dts
@@ -68,6 +68,10 @@
 	status = "okay";
 };
 
+&clk_lse {
+	status = "okay";
+};
+
 &pll {
 	div-m = <4>;
 	mul-n = <275>;