--- qemu/hw/firmware_abi.h	2018/04/24 16:48:59	1.1.1.1
+++ qemu/hw/firmware_abi.h	2018/04/24 16:54:02	1.1.1.2
@@ -139,7 +139,7 @@ OpenBIOS_finish_partition(struct OpenBIO
 }
 
 static inline uint32_t
-OpenBIOS_set_var(uint8_t *nvram, uint32_t addr, const unsigned char *str)
+OpenBIOS_set_var(uint8_t *nvram, uint32_t addr, const char *str)
 {
     uint32_t len;