diff --git a/STM32F1/system/libmaple/include/libmaple/scb.h b/STM32F1/system/libmaple/include/libmaple/scb.h
index 0b01480..d58434c 100644
--- a/STM32F1/system/libmaple/include/libmaple/scb.h
+++ b/STM32F1/system/libmaple/include/libmaple/scb.h
@@ -122,7 +122,7 @@ typedef struct scb_reg_map {
 #define SCB_AIRCR_VECTKEYSTAT           (0x5FA << 16)
 #define SCB_AIRCR_VECTKEY               (0x5FA << 16)
 #define SCB_AIRCR_ENDIANNESS            (1U << 15)
-#define SCB_AIRCR_PRIGROUP              (0x3 << 8)
+#define SCB_AIRCR_PRIGROUP              (0x7 << 8)
 #define SCB_AIRCR_SYSRESETREQ           (1U << 2)
 #define SCB_AIRCR_VECTCLRACTIVE         (1U << 1)
 #define SCB_AIRCR_VECTRESET             (1U << 0)