diff --git a/drivers/st/timer/stm32_timer.c b/drivers/st/timer/stm32_timer.c
index f9cbcc4bd147dbee7d54df98e0d92d9a11ef0ac6..a4e178ec4cb8a1f184f139cb465141e8ff71446b 100644
--- a/drivers/st/timer/stm32_timer.c
+++ b/drivers/st/timer/stm32_timer.c
@@ -287,7 +287,7 @@ int stm32_timer_init(void)
 				}
 			}
 
-			cuint = fdt_getprop(fdt, node, "st,csi_cal-input",
+			cuint = fdt_getprop(fdt, node, "st,csi-cal-input",
 					    NULL);
 			if (cuint != NULL) {
 				timer = &stm32_timer[CSI_CAL];
diff --git a/fdts/stm32mp157c-ed1.dts b/fdts/stm32mp157c-ed1.dts
index d164f52eafac54f750a423ee79c678fef8ffb459..09403503d4a785ea1c196bce5168117d4dfeddc3 100644
--- a/fdts/stm32mp157c-ed1.dts
+++ b/fdts/stm32mp157c-ed1.dts
@@ -373,7 +373,7 @@
 &timers15 {
 	secure-status = "okay";
 	st,hsi-cal-input = <7>;
-	st,csi_cal-input = <8>;
+	st,csi-cal-input = <8>;
 };
 
 /* Low-power states of regulators */
diff --git a/fdts/stm32mp15xx-dkx.dtsi b/fdts/stm32mp15xx-dkx.dtsi
index a6d500e0bddf317bf641130635dffdd813faded9..e56fe9b2cebbdec40fea6a9fb94adca2b4c8a477 100644
--- a/fdts/stm32mp15xx-dkx.dtsi
+++ b/fdts/stm32mp15xx-dkx.dtsi
@@ -344,7 +344,7 @@
 &timers15 {
 	secure-status = "okay";
 	st,hsi-cal-input = <7>;
-	st,csi_cal-input = <8>;
+	st,csi-cal-input = <8>;
 };
 
 &uart4 {