diff --git a/arch/arm/boot/dts/stm32h743i-disco.dts b/arch/arm/boot/dts/stm32h743i-disco.dts
index 79e841d94079..45e088c55741 100644
--- a/arch/arm/boot/dts/stm32h743i-disco.dts
+++ b/arch/arm/boot/dts/stm32h743i-disco.dts
@@ -63,7 +63,7 @@ aliases {
 };
 
 &clk_hse {
-	clock-frequency = <125000000>;
+	clock-frequency = <25000000>;
 };
 
 &usart2 {