diff --git a/firmware/hw_layer/flash.c b/firmware/hw_layer/flash.c
index 9e3b055199..f716e48b00 100644
--- a/firmware/hw_layer/flash.c
+++ b/firmware/hw_layer/flash.c
@@ -14,17 +14,6 @@
 #include "flash.h"
 #include <string.h>
 
-size_t flashSectorSize(flashsector_t sector) {
-	// sectors 0..11 are the 1st memory bank (1Mb), and 12..23 are the 2nd (the same structure).
-	if (sector <= 3 || (sector >= 12 && sector <= 15))
-		return 16 * 1024;
-	else if (sector == 4 || sector == 16)
-		return 64 * 1024;
-	else if ((sector >= 5 && sector <= 11) || (sector >= 17 && sector <= 23))
-		return 128 * 1024;
-	return 0;
-}
-
 flashaddr_t flashSectorBegin(flashsector_t sector) {
 	flashaddr_t address = FLASH_BASE;
 	while (sector > 0) {
diff --git a/firmware/hw_layer/stm32f4/mpu_util.cpp b/firmware/hw_layer/stm32f4/mpu_util.cpp
index 3dc3ae8215..72124946a1 100644
--- a/firmware/hw_layer/stm32f4/mpu_util.cpp
+++ b/firmware/hw_layer/stm32f4/mpu_util.cpp
@@ -10,6 +10,7 @@
 #if EFI_PROD_CODE
 
 #include "mpu_util.h"
+#include "flash.h"
 #include "error_handling.h"
 #include "engine.h"
 #include "pin_repository.h"
@@ -420,5 +421,16 @@ CANDriver * detectCanDevice(brain_pin_e pinRx, brain_pin_e pinTx) {
 
 #endif /* EFI_CAN_SUPPORT */
 
+size_t flashSectorSize(flashsector_t sector) {
+	// sectors 0..11 are the 1st memory bank (1Mb), and 12..23 are the 2nd (the same structure).
+	if (sector <= 3 || (sector >= 12 && sector <= 15))
+		return 16 * 1024;
+	else if (sector == 4 || sector == 16)
+		return 64 * 1024;
+	else if ((sector >= 5 && sector <= 11) || (sector >= 17 && sector <= 23))
+		return 128 * 1024;
+	return 0;
+}
+
 #endif /* EFI_PROD_CODE */
 
diff --git a/firmware/hw_layer/stm32f7/mpu_util.cpp b/firmware/hw_layer/stm32f7/mpu_util.cpp
index 7813dc7d55..db60df531e 100644
--- a/firmware/hw_layer/stm32f7/mpu_util.cpp
+++ b/firmware/hw_layer/stm32f7/mpu_util.cpp
@@ -7,6 +7,7 @@
 
 #include "global.h"
 #include "mpu_util.h"
+#include "flash.h"
 #include "error_handling.h"
 #include "engine.h"
 #include "pin_repository.h"
@@ -411,3 +412,14 @@ CANDriver * detectCanDevice(brain_pin_e pinRx, brain_pin_e pinTx) {
 
 #endif /* EFI_CAN_SUPPORT */
 
+size_t flashSectorSize(flashsector_t sector) {
+	// sectors 0..11 are the 1st memory bank (1Mb), and 12..23 are the 2nd (the same structure).
+	if (sector <= 3 || (sector >= 12 && sector <= 15))
+		return 32 * 1024;
+	else if (sector == 4 || sector == 16)
+		return 128 * 1024;
+	else if ((sector >= 5 && sector <= 11) || (sector >= 17 && sector <= 23))
+		return 256 * 1024;
+	return 0;
+}
+