--- sudo.c.orig	2009-04-07 11:51:14.000000000 +0000
+++ sudo.c	2009-04-07 11:51:30.000000000 +0000
@@ -1086,7 +1086,7 @@
 	    log_error(USE_ERRNO, "can't read %s", sudoers);
 	rewind(fp);
     }
-    (void) fcntl(fileno(fp), F_SETFD, 1);
+    if (fp) (void) fcntl(fileno(fp), F_SETFD, 1);
 
     set_perms(PERM_ROOT);		/* change back to root */
     return(fp);