diff --git a/src/kauth/krb_udp.c b/src/kauth/krb_udp.c
index 4154fe1fcb..137cd7dd18 100644
--- a/src/kauth/krb_udp.c
+++ b/src/kauth/krb_udp.c
@@ -19,8 +19,10 @@ RCSID("$Header$");
 
 #include <afs/stds.h>
 #include <sys/types.h>
+#include <errno.h>
 #ifdef AFS_NT40_ENV
 #include <winsock2.h>
+#include <afs/errmap_nt.h>
 #define snprintf _snprintf
 #else
 #include <sys/socket.h>