diff --git a/drivers/can/can_stm32.c b/drivers/can/can_stm32.c
index e008f71aa0af00..eb99bcd0aab2cb 100644
--- a/drivers/can/can_stm32.c
+++ b/drivers/can/can_stm32.c
@@ -374,9 +374,11 @@ int can_stm32_set_timing(const struct device *dev,
 	can->BTR &= ~(CAN_BTR_BRP_Msk | CAN_BTR_TS1_Msk |
 		      CAN_BTR_TS2_Msk | CAN_BTR_SJW_Msk);
 
-	can->BTR |= (((timing->phase_seg1 - 1) & 0x0F) << CAN_BTR_TS1_Pos) |
-		    (((timing->phase_seg2 - 1) & 0x07) << CAN_BTR_TS2_Pos) |
-		    (((timing->sjw        - 1) & 0x07) << CAN_BTR_SJW_Pos);
+	can->BTR |=
+	     (((timing->phase_seg1 - 1) << CAN_BTR_TS1_Pos) & CAN_BTR_TS1_Msk) |
+	     (((timing->phase_seg2 - 1) << CAN_BTR_TS2_Pos) & CAN_BTR_TS2_Msk) |
+	     (((timing->sjw        - 1) << CAN_BTR_SJW_Pos) & CAN_BTR_SJW_Msk) |
+	     (((timing->prescaler  - 1) << CAN_BTR_BRP_Pos) & CAN_BTR_BRP_Msk);
 
 	ret = can_leave_init_mode(can);
 	if (ret) {