diff --git a/libc/dns/dns.h b/libc/dns/dns.h
index 6bc2a285b..5205a42a9 100644
--- a/libc/dns/dns.h
+++ b/libc/dns/dns.h
@@ -47,7 +47,7 @@ struct addrinfo {
 int getaddrinfo(const char *, const char *, const struct addrinfo *,
                 struct addrinfo **) paramsnonnull((4));
 int freeaddrinfo(struct addrinfo *);
-const char *eai2str(int);
+const char *gai_strerror(int);
 int dnsnamecmp(const char *, const char *) paramsnonnull();
 int pascalifydnsname(uint8_t *, size_t, const char *) paramsnonnull();
 int resolvedns(const struct ResolvConf *, int, const char *, struct sockaddr *,
diff --git a/libc/dns/eai2str.c b/libc/dns/gai_strerror.c
similarity index 98%
rename from libc/dns/eai2str.c
rename to libc/dns/gai_strerror.c
index b14c3bdc7..7218a5792 100644
--- a/libc/dns/eai2str.c
+++ b/libc/dns/gai_strerror.c
@@ -21,7 +21,7 @@
 /**
  * Turns getaddrinfo() return code into string.
  */
-const char *eai2str(int code) {
+const char *gai_strerror(int code) {
   switch (code) {
     case EAI_ADDRFAMILY:
       return "ADDRFAMILY";
diff --git a/tool/build/runit.c b/tool/build/runit.c
index a13e64e5b..99a8f86b6 100644
--- a/tool/build/runit.c
+++ b/tool/build/runit.c
@@ -260,7 +260,7 @@ void Connect(void) {
   struct addrinfo *ai;
   if ((rc = getaddrinfo(g_hostname, gc(xasprintf("%hu", g_runitdport)),
                         &kResolvHints, &ai)) != 0) {
-    FATALF("%s:%hu: EAI_%s %m", g_hostname, g_runitdport, eai2str(rc));
+    FATALF("%s:%hu: EAI_%s %m", g_hostname, g_runitdport, gai_strerror(rc));
     unreachable;
   }
   ip4 = (const char *)&ai->ai_addr4->sin_addr;
diff --git a/tool/net/dig.c b/tool/net/dig.c
index 2dc97808b..ab56fa116 100644
--- a/tool/net/dig.c
+++ b/tool/net/dig.c
@@ -44,7 +44,7 @@ void lookup(const char *name) {
       perror("getaddrinfo");
       exit(1);
     default:
-      fprintf(stderr, "getaddrinfo failed: %d (EAI_%s)\n", rc, eai2str(rc));
+      fprintf(stderr, "getaddrinfo failed: %d (EAI_%s)\n", rc, gai_strerror(rc));
       exit(1);
   }
   if (addrs) {