diff --git a/app/include/rom.h b/app/include/rom.h
index 409d2bbe..0a39194e 100644
--- a/app/include/rom.h
+++ b/app/include/rom.h
@@ -149,4 +149,7 @@ void srand(unsigned int);
 
 void uart_div_modify(int no, unsigned int freq);
 
+/* Returns 0 on success, 1 on failure */
+uint8_t SPIRead(uint32_t src_addr, uint32_t *des_addr, uint32_t size);
+
 #endif
diff --git a/app/platform/flash_api.h b/app/platform/flash_api.h
index 20935b2f..32475361 100644
--- a/app/platform/flash_api.h
+++ b/app/platform/flash_api.h
@@ -86,8 +86,6 @@ typedef struct
     uint32_t segment_size;
 } ICACHE_STORE_TYPEDEF_ATTR SPIFlashInfo;
 
-SpiFlashOpResult SPIRead(uint32_t src_addr, uint32_t *des_addr, uint32_t size);
-
 uint32_t flash_detect_size_byte(void);
 uint32_t flash_safe_get_size_byte(void);
 uint16_t flash_safe_get_sec_num(void);