diff --git a/Target/Source/ARMCM33_STM32L5/flash.c b/Target/Source/ARMCM33_STM32L5/flash.c
index acbdfc29..b2d21c0d 100644
--- a/Target/Source/ARMCM33_STM32L5/flash.c
+++ b/Target/Source/ARMCM33_STM32L5/flash.c
@@ -237,6 +237,8 @@ void FlashInit(void)
   /* init the flash block info structs by setting the address to an invalid address */
   blockInfo.base_addr = FLASH_INVALID_ADDRESS;
   bootBlockInfo.base_addr = FLASH_INVALID_ADDRESS;
+  /* make sure the instruction cache is disabled prior to updating cacheable memory. */
+  HAL_ICACHE_Disable();
 } /*** end of FlashInit ***/