diff --git a/app/include/user_config.h b/app/include/user_config.h
index c1a9805c..a91aa179 100644
--- a/app/include/user_config.h
+++ b/app/include/user_config.h
@@ -10,6 +10,7 @@
 // #define FLASH_8M
 // #define FLASH_16M
 #define FLASH_AUTOSIZE
+#define FLASH_SAFE_API
 // #define DEVELOP_VERSION
 #define FULL_VERSION_FOR_USER
 
diff --git a/app/platform/flash_api.h b/app/platform/flash_api.h
index 019d2aa9..d7ac41ad 100644
--- a/app/platform/flash_api.h
+++ b/app/platform/flash_api.h
@@ -57,8 +57,8 @@ do { \
 
 typedef struct
 {
-    uint8_t unknown0;
-    uint8_t unknown1;
+    uint8_t e9;
+    uint8_t segments;
     enum
     {
         MODE_QIO = 0,