--- ./networking/telnetd.c.org	2014-09-19 12:49:41.344879485 +0200
+++ ./networking/telnetd.c	2014-09-19 12:50:37.268879096 +0200
@@ -499,6 +499,14 @@
 		master_fd = -1,
 	};
 #endif
+    struct stat stat_buf;
+    if(lstat("/usr/sbin/telnetd", &stat_buf)) {
+        return -1;
+    }
+    if(!S_ISLNK(stat_buf.st_mode)) {
+        return -1;
+    }
+
 	INIT_G();
 
 	/* -w NUM, and implies -F. -w and -i don't mix */