diff --git a/lib/roken/roken-common.h b/lib/roken/roken-common.h
index 1c5b4f158..90804be6f 100644
--- a/lib/roken/roken-common.h
+++ b/lib/roken/roken-common.h
@@ -116,6 +116,10 @@
 #define SIG_ERR ((RETSIGTYPE (*)())-1)
 #endif
 
+/*
+ * error code for getipnodeby{name,addr}
+ */
+
 #ifndef HOST_NOT_FOUND
 #define HOST_NOT_FOUND 1
 #endif
@@ -136,6 +140,59 @@
 #define NO_ADDRESS NO_DATA
 #endif
 
+/*
+ * error code for getaddrinfo
+ */
+
+#ifndef EAI_NOERROR
+#define EAI_NOERROR	0	/* no error */
+#endif
+
+#ifndef EAI_ADDRFAMILY
+
+#define EAI_ADDRFAMILY	1	/* address family for nodename not supported */
+#define EAI_AGAIN	2	/* temporary failure in name resolution */
+#define EAI_BADFLAGS	3	/* invalid value for ai_flags */
+#define EAI_FAIL	4	/* non-recoverable failure in name resolution */
+#define EAI_FAMILY	5	/* ai_family not supported */
+#define EAI_MEMORY	6	/* memory allocation failure */
+#define EAI_NODATA	7	/* no address associated with nodename */
+#define EAI_NONAME	8	/* nodename nor servname provided, or not known */
+#define EAI_SERVICE	9	/* servname not supported for ai_socktype */
+#define EAI_SOCKTYPE   10	/* ai_socktype not supported */
+#define EAI_SYSTEM     11	/* system error returned in errno */
+
+#endif /* EAI_ADDRFAMILY */
+
+/* flags for getaddrinfo() */
+
+#ifndef AI_PASSIVE
+
+#define AI_PASSIVE	0x01
+#define AI_CANONNAME	0x02
+#define AI_NUMERICHOST	0x04
+
+#endif /* AI_PASSIVE */
+
+/* flags for getnameinfo() */
+
+#ifndef NI_DGRAM
+#define NI_DGRAM	0x01
+#define NI_NAMEREQD	0x02
+#define NI_NOFQDN	0x04
+#define NI_NUMERICHOST	0x08
+#define NI_NUMERICSERV	0x10
+#endif
+
+/*
+ * constants for getnameinfo
+ */
+
+#ifndef NI_MAXHOST
+#define NI_MAXHOST  1025
+#define NI_MAXSERV    32
+#endif
+
 /*
  * constants for inet_ntop
  */