--- a/include/netdb.h
+++ b/include/netdb.h
@@ -124,6 +124,8 @@
 #define NO_RECOVERY    3
 #define NO_DATA        4
 #define NO_ADDRESS     NO_DATA
+#define NETDB_INTERNAL -1
+#define NETDB_SUCCESS  0
 #endif
 
 #if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)