diff --git a/kern/include/overwrite.h b/kern/include/overwrite.h
new file mode 100644
index 0000000..4a3b220
--- /dev/null
+++ b/kern/include/overwrite.h
@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2000, 2001, 2002, 2003, 2004, 2005, 2008, 2009
+ *	The President and Fellows of Harvard College.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE UNIVERSITY OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * WARNING: All the contents of this file are overwritten during automated
+ * testing. Please consider this before changing anything in this file.
+ */
+
+#ifndef _OVERWRITE_H_
+#define _OVERWRITE_H_
+
+/*
+ * You can set a custom prompt here, but the default will be used during
+ * testing.
+ */
+
+#define KERNEL_PROMPT    "OS/161 kernel [? for menu]: "
+
+#endif /* _OVERWRITE_H_ */
diff --git a/kern/main/menu.c b/kern/main/menu.c
index 8905f09..89e3792 100644
--- a/kern/main/menu.c
+++ b/kern/main/menu.c
@@ -41,6 +41,7 @@
 #include <sfs.h>
 #include <syscall.h>
 #include <test.h>
+#include <overwrite.h>
 #include "opt-sfs.h"
 #include "opt-net.h"
 
@@ -724,7 +725,11 @@ menu(char *args)
 	menu_execute(args, 1);
 
 	while (1) {
-		kprintf("OS/161 kernel [? for menu]: ");
+		/*
+		 * Defined in overwrite.h. If you want to change the kernel prompt, please
+		 * do it in that file. Otherwise automated test testing will break.
+		 */
+		kprintf(KERNEL_PROMPT);
 		kgets(buf, sizeof(buf));
 		menu_execute(buf, 0);
 	}