1 files changed, 5 insertions, 0 deletions
diff --git a/etrn.c b/etrn.c
index 5ccc0f86..6b6df343 100644
--- a/etrn.c
+++ b/etrn.c
@@ -14,6 +14,9 @@
 #include  "smtp.h"
 #include  "socket.h"
 
+#ifdef HAVE_GETHOSTBYNAME
+#include <netdb.h>
+
 static int etrn_ok (int sock, char *argbuf)
 /* parse command response */
 {
@@ -187,4 +190,6 @@ int doETRN (struct query *ctl)
     return(do_protocol(ctl, &etrn));
 }
 
+#endif /* HAVE_GETHOSTBYNAME */
+
 /* etrn.c ends here */