diff --git a/libc/include/net/if.h b/libc/include/net/if.h
index eac7699..f261f71 100644
--- a/libc/include/net/if.h
+++ b/libc/include/net/if.h
@@ -44,10 +44,10 @@
   char* if_name;
 };
 
-char* if_indextoname(unsigned, char*);
-unsigned if_nametoindex(const char*);
+char* if_indextoname(unsigned __index, char* __buf);
+unsigned if_nametoindex(const char* __name);
 struct if_nameindex* if_nameindex(void) __INTRODUCED_IN(24);
-void if_freenameindex(struct if_nameindex*) __INTRODUCED_IN(24);
+void if_freenameindex(struct if_nameindex* __ptr) __INTRODUCED_IN(24);
 
 __END_DECLS