diff --git a/lib/lwres/gai_strerror.c b/lib/lwres/gai_strerror.c
index 70b35b0d80..8eef806808 100644
--- a/lib/lwres/gai_strerror.c
+++ b/lib/lwres/gai_strerror.c
@@ -63,7 +63,8 @@ static const char *gai_messages[] = {
 	"ai_socktype not supported",
 	"system error returned in errno",
 	"bad hints",
-	"bad protocol"
+	"bad protocol",
+	"overflow"
 };
 
 /*% Returns an error message corresponding to an error code returned by getaddrinfo() */
diff --git a/lib/lwres/include/lwres/netdb.h.in b/lib/lwres/include/lwres/netdb.h.in
index 0844384e52..d961351096 100644
--- a/lib/lwres/include/lwres/netdb.h.in
+++ b/lib/lwres/include/lwres/netdb.h.in
@@ -88,6 +88,7 @@ struct addrinfo {
 #undef	EAI_SYSTEM
 #undef	EAI_BADHINTS
 #undef	EAI_PROTOCOL
+#undef	EAI_OVERFLOW
 #undef	EAI_MAX
 
 #define	EAI_ADDRFAMILY	 1	/* address family for hostname not supported */
@@ -103,7 +104,8 @@ struct addrinfo {
 #define	EAI_SYSTEM	11	/* system error returned in errno */
 #define EAI_BADHINTS	12
 #define EAI_PROTOCOL	13
-#define EAI_MAX		14
+#define EAI_OVERFLOW	14
+#define EAI_MAX		15
 
 /*
  * Flag values for getaddrinfo()