--- src/nighthawk.cc.BAK	Sun Feb  7 01:01:57 1999
+++ src/nighthawk.cc	Sun Feb  7 01:02:10 1999
@@ -85,7 +85,11 @@
   FILE *fp;
 
   if((fp = fopen(filename,mode)) != NULL)
+#ifdef __NetBSD__
+    flock(fp->_file,LOCK_EX);
+#else
     flock(fp->_fileno,LOCK_EX);
+#endif
   return fp;
 }