diff --git a/libc/include/sys/auxv.h b/libc/include/sys/auxv.h
index ab5a39d..9251390 100644
--- a/libc/include/sys/auxv.h
+++ b/libc/include/sys/auxv.h
@@ -35,8 +35,8 @@
 
 __BEGIN_DECLS
 
-unsigned long int getauxval(unsigned long int type) __INTRODUCED_IN(18);
+unsigned long int getauxval(unsigned long int __type) __INTRODUCED_IN(18);
 
 __END_DECLS
 
-#endif /* _SYS_AUXV_H_ */
+#endif