diff --git a/libs/libc/netdb/lib_getaddrinfo.c b/libs/libc/netdb/lib_getaddrinfo.c
index 2d5ae0f6c7..0e2e69f550 100644
--- a/libs/libc/netdb/lib_getaddrinfo.c
+++ b/libs/libc/netdb/lib_getaddrinfo.c
@@ -169,7 +169,7 @@ int getaddrinfo(FAR const char *hostname, FAR const char *servname,
       FAR char *endp;
 
       port = strtol(servname, &endp, 10);
-      if (port > 0 && port <= 65535 && *endp == '\0')
+      if (port >= 0 && port <= 65535 && *endp == '\0')
         {
           /* Force network byte order */
 
diff --git a/libs/libc/netdb/lib_getnameinfo.c b/libs/libc/netdb/lib_getnameinfo.c
index 333a335e15..6c517e8ccf 100644
--- a/libs/libc/netdb/lib_getnameinfo.c
+++ b/libs/libc/netdb/lib_getnameinfo.c
@@ -53,7 +53,7 @@ int getnameinfo(FAR const struct sockaddr *addr, socklen_t addrlen,
   int ret;
 
   if (addr && addr->sa_family == AF_INET &&
-      addrlen == sizeof(struct sockaddr_in))
+      addrlen >= sizeof(struct sockaddr_in))
     {
       FAR const struct sockaddr_in *sa_in;