diff --git a/arch/arm/soc/st_stm32/stm32f0/flash_registers.h b/arch/arm/soc/st_stm32/stm32f0/flash_registers.h
index 8718b5542d0..77fd5e7c907 100644
--- a/arch/arm/soc/st_stm32/stm32f0/flash_registers.h
+++ b/arch/arm/soc/st_stm32/stm32f0/flash_registers.h
@@ -37,15 +37,16 @@ union ef_acr {
 };
 
 /* 3.3.5 Embedded flash registers */
-struct stm32_flash {
-	union ef_acr acr;
-	u32_t keyr;
-	u32_t optkeyr;
-	u32_t sr;
-	u32_t cr;
-	u32_t ar;
-	u32_t obr;
-	u32_t wrpr;
+struct stm32f0x_flash {
+	volatile union ef_acr acr;
+	volatile u32_t keyr;
+	volatile u32_t optkeyr;
+	volatile u32_t sr;
+	volatile u32_t cr;
+	volatile u32_t ar;
+	volatile u32_t rsvd;
+	volatile u32_t obr;
+	volatile u32_t wrpr;
 };
 
 #endif /* _STM32F0X_FLASH_REGISTERS_H_ */