diff --git a/nuke-room-from-db.sh b/nuke-room-from-db.sh
new file mode 100755
index 0000000000..58c036c896
--- /dev/null
+++ b/nuke-room-from-db.sh
@@ -0,0 +1,24 @@
+#!/bin/bash
+
+## CAUTION:
+## This script will remove (hopefully) all trace of the given room ID from
+## your homeserver.db
+
+## Do not run it lightly.
+
+ROOMID="$1"
+
+sqlite3 homeserver.db <<EOF
+DELETE FROM context_depth WHERE context = '$ROOMID';
+DELETE FROM current_state WHERE context = '$ROOMID';
+DELETE FROM feedback WHERE room_id = '$ROOMID';
+DELETE FROM messages WHERE room_id = '$ROOMID';
+DELETE FROM pdu_backward_extremities WHERE context = '$ROOMID';
+DELETE FROM pdu_edges WHERE context = '$ROOMID';
+DELETE FROM pdu_forward_extremities WHERE context = '$ROOMID';
+DELETE FROM pdus WHERE context = '$ROOMID';
+DELETE FROM room_data WHERE room_id = '$ROOMID';
+DELETE FROM room_memberships WHERE room_id = '$ROOMID';
+DELETE FROM rooms WHERE room_id = '$ROOMID';
+DELETE FROM state_pdus WHERE context = '$ROOMID';
+EOF