diff --git a/include/netdb.h b/include/netdb.h
index f07cbf3fdaa7..2e3ae67a1df4 100644
--- a/include/netdb.h
+++ b/include/netdb.h
@@ -157,8 +157,7 @@ struct addrinfo {
 #define	EAI_SYSTEM	11	/* system error returned in errno */
 #define	EAI_BADHINTS	12
 #define	EAI_PROTOCOL	13
-#define	EAI_RESNULL	14
-#define	EAI_MAX		15
+#define	EAI_MAX		14
 
 /*
  * Flag values for getaddrinfo()
diff --git a/lib/libc/net/getaddrinfo.3 b/lib/libc/net/getaddrinfo.3
index 2c1c765d60b6..ef645c5aa95e 100644
--- a/lib/libc/net/getaddrinfo.3
+++ b/lib/libc/net/getaddrinfo.3
@@ -560,11 +560,6 @@ Invalid value for
 .Fa hints .
 .It Dv EAI_PROTOCOL
 Resolved protocol is unknown.
-.It Dv EAI_RESNULL
-Argument
-.Fa res
-is
-.Dv NULL .
 .It Dv EAI_MAX
 Unknown error.
 .El
diff --git a/lib/libc/net/getaddrinfo.c b/lib/libc/net/getaddrinfo.c
index 09cc623232d9..c54b2521d4fc 100644
--- a/lib/libc/net/getaddrinfo.c
+++ b/lib/libc/net/getaddrinfo.c
@@ -78,7 +78,6 @@
  * diffs with other KAME platforms:
  * - other KAME platforms already nuked FAITH ($GAI), but as FreeBSD
  *   4.0-RELEASE supplies it, we still have the code here.
- * - EAI_RESNULL support
  * - AI_ADDRCONFIG support is supplied
  * - EDNS0 support is not available due to resolver differences
  * - some of FreeBSD style (#define tabify and others)
@@ -266,9 +265,6 @@ static char *ai_errlist[] = {
 	"System error returned in errno", 		/* EAI_SYSTEM     */
 	"Invalid value for hints",			/* EAI_BADHINTS	  */
 	"Resolved protocol is unknown",			/* EAI_PROTOCOL   */
-#ifdef EAI_RESNULL
-	"Argument res is NULL",				/* EAI_RESNULL	  */
-#endif
 	"Unknown error", 				/* EAI_MAX        */
 };
 
@@ -382,10 +378,6 @@ getaddrinfo(hostname, servname, hints, res)
 
 	if (hostname == NULL && servname == NULL)
 		return EAI_NONAME;
-#ifdef EAI_RESNULL
-	if (res == NULL)
-		return EAI_RESNULL; /* xxx */
-#endif
 	if (hints) {
 		/* error check for hints */
 		if (hints->ai_addrlen || hints->ai_canonname ||