diff --git a/libc/kernel/uapi/linux/bcache.h b/libc/kernel/uapi/linux/bcache.h
index 4c7e32a..1bee0a3 100644
--- a/libc/kernel/uapi/linux/bcache.h
+++ b/libc/kernel/uapi/linux/bcache.h
@@ -29,8 +29,8 @@
   __u64 ptr[];
 };
 #define KEY_FIELD(name,field,offset,size) BITMASK(name, struct bkey, field, offset, size)
-#define PTR_FIELD(name,offset,size) static inline __u64 name(const struct bkey * k, unsigned i) \
-{ return(k->ptr[i] >> offset) & ~(~0ULL << size); } static inline void SET_ ##name(struct bkey * k, unsigned i, __u64 v) \
+#define PTR_FIELD(name,offset,size) static inline __u64 name(const struct bkey * k, unsigned int i) \
+{ return(k->ptr[i] >> offset) & ~(~0ULL << size); } static inline void SET_ ##name(struct bkey * k, unsigned int i, __u64 v) \
 { k->ptr[i] &= ~(~(~0ULL << size) << offset); k->ptr[i] |= (v & ~(~0ULL << size)) << offset; \
 }
 #define KEY_SIZE_BITS 16