diff --git a/libc/include/arpa/inet.h b/libc/include/arpa/inet.h
index e78e7c5..b008812 100644
--- a/libc/include/arpa/inet.h
+++ b/libc/include/arpa/inet.h
@@ -42,7 +42,7 @@
 extern char*         inet_ntoa(struct in_addr);
 
 extern int           inet_pton(int, const char *, void *);
-extern const char*   inet_ntop(int, const void *, char *, size_t);
+extern const char*   inet_ntop(int, const void *, char *, socklen_t);
 
 extern unsigned int  inet_nsap_addr(const char *, unsigned char *, int);
 extern char*         inet_nsap_ntoa(int, const unsigned char *, char *);