diff --git a/firmware/main.c b/firmware/main.c
index d813aac..037c9dd 100644
--- a/firmware/main.c
+++ b/firmware/main.c
@@ -1887,7 +1887,7 @@ void main(void)
 #if CONFIG_STOCK_FW
 		// after 300ms check if we should jump to user firmware
 		if (!user_app_checked && ticks > 300 / 20) {
-			if (app_flag == 1 && ctl_regs[REG_SYS_USER_APP_BLOCK - REG_SYS_CONFIG] != REG_SYS_USER_APP_BLOCK_MAGIC)
+			if (app_flag == 1 && REG_SYS(USER_APP_BLOCK) != REG_SYS_USER_APP_BLOCK_MAGIC)
 				jmp_to_user_fw();
 
 			user_app_checked = 1;