diff --git a/firmware/config/boards/subaru_eg33/board.mk b/firmware/config/boards/subaru_eg33/board.mk
index 515ee72a68..ddc52b4ad2 100644
--- a/firmware/config/boards/subaru_eg33/board.mk
+++ b/firmware/config/boards/subaru_eg33/board.mk
@@ -34,6 +34,9 @@ DDEFS += -DEFI_LOGIC_ANALYZER=FALSE
 DDEFS += -DHAL_USE_UART=FALSE
 DDEFS += -DUART_USE_WAIT=FALSE
 
+#Linker options, flash size
+USE_OPT += -Wl,--defsym=FLASH_SIZE=1m
+
 # Shared variables
 ALLINC    += $(BOARDINC)
 
diff --git a/firmware/hw_layer/ports/stm32/stm32f7/STM32F7.ld b/firmware/hw_layer/ports/stm32/stm32f7/STM32F7.ld
index 794453617e..46814a62ec 100644
--- a/firmware/hw_layer/ports/stm32/stm32f7/STM32F7.ld
+++ b/firmware/hw_layer/ports/stm32/stm32f7/STM32F7.ld
@@ -24,11 +24,16 @@
  * BSS is placed in DTCM RAM in order to simplify DMA buffers management.
  * 'bl' is related to rusefi bootloader
  */
+
+ /* TODO: 512k flash limit is a mitigation for https://github.com/rusefi/rusefi/issues/3566 and https://github.com/rusefi/rusefi/issues/3775 */
+flash_size = DEFINED(FLASH_SIZE) ? FLASH_SIZE : 512k;
+
 MEMORY
 {
     bl          : org = 0x08000000, len = 16k       /* bootloader section */
-	/* TODO: 512k flash limit is a mitigation for https://github.com/rusefi/rusefi/issues/3566 and https://github.com/rusefi/rusefi/issues/3775 */
-    flash0 (rx) : org = DEFINED(BOOTLOADER) ? 0x08008000 : 0x08000000, len = DEFINED(BOOTLOADER) ? (512k - 32k) : 512k  /* change address & length if bootloader */
+    /* change address & length if bootloader */
+    flash0 (rx) : org = DEFINED(BOOTLOADER) ? 0x08008000 : 0x08000000, len = DEFINED(BOOTLOADER) ? (flash_size - 32k) : FLASH_SIZE
+    /* TODO: should we use same flash_size for flash@ITCM? */
     flash1 (rx) : org = DEFINED(BOOTLOADER) ? 0x00208000 : 0x00200000, len = DEFINED(BOOTLOADER) ? (2m - 32k) : 2m /* Flash as ITCM */
     flash2 (rx) : org = 0x00000000, len = 0
     flash3 (rx) : org = 0x00000000, len = 0