diff --git a/kadmin/kadmin_locl.h b/kadmin/kadmin_locl.h
index 9aa2a1747..e592c0094 100644
--- a/kadmin/kadmin_locl.h
+++ b/kadmin/kadmin_locl.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 1998 Kungliga Tekniska Högskolan
+ * Copyright (c) 1997-1999 Kungliga Tekniska Högskolan
  * (Royal Institute of Technology, Stockholm, Sweden). 
  * All rights reserved. 
  *
@@ -73,6 +73,9 @@
 #ifdef HAVE_NETDB_H
 #include <netdb.h>
 #endif
+#ifdef HAVE_SYS_UN_H
+#include <sys/un.h>
+#endif
 #include <err.h>
 #include <roken.h>
 #include <krb5.h>