diff --git a/libc/include/sha1.h b/libc/include/sha1.h
index f7ada46..adfa1fc 100644
--- a/libc/include/sha1.h
+++ b/libc/include/sha1.h
@@ -18,14 +18,14 @@
 typedef struct {
 	uint32_t state[5];
 	uint32_t count[2];
-	u_char buffer[64];
+	uint8_t buffer[64];
 } SHA1_CTX;
 
 __BEGIN_DECLS
-void	SHA1Transform(uint32_t[5], const u_char[64]);
+void	SHA1Transform(uint32_t[5], const uint8_t[64]);
 void	SHA1Init(SHA1_CTX *);
-void	SHA1Update(SHA1_CTX *, const u_char *, u_int);
-void	SHA1Final(u_char[SHA1_DIGEST_LENGTH], SHA1_CTX *);
+void	SHA1Update(SHA1_CTX *, const uint8_t *, unsigned int);
+void	SHA1Final(uint8_t[SHA1_DIGEST_LENGTH], SHA1_CTX *);
 __END_DECLS
 
 #endif /* _SYS_SHA1_H_ */