diff --git a/libraries/AP_HAL_ChibiOS/Storage.h b/libraries/AP_HAL_ChibiOS/Storage.h
index 54577f67ef..beccd623b1 100644
--- a/libraries/AP_HAL_ChibiOS/Storage.h
+++ b/libraries/AP_HAL_ChibiOS/Storage.h
@@ -30,7 +30,11 @@
 // when using flash storage we use a small line size to make storage
 // compact and minimise the number of erase cycles needed
 #ifdef STORAGE_FLASH_PAGE
+#if defined(STM32H7XX)
+#define CH_STORAGE_LINE_SHIFT 4
+#else
 #define CH_STORAGE_LINE_SHIFT 3
+#endif
 #elif defined(USE_POSIX) && !defined(HAL_WITH_RAMTRON)
 #define CH_STORAGE_LINE_SHIFT 9
 #else