diff --git a/reference.txt b/reference.txt
new file mode 100644
index 00000000000..6bd33fc53ee
--- /dev/null
+++ b/reference.txt
@@ -0,0 +1 @@
+687c5ba800c3e076f4340b2283502ea577046b50
diff --git a/references.txt b/references.txt
index 36a24981255..5743a0b6190 100644
--- a/references.txt
+++ b/references.txt
@@ -203,3 +203,4 @@ ffed231e91d01608e1bb08ecc1883cf00d9d9293
 4aa1e888d0003de63e2b21493c61c1c5e342bfe4
 48bbac8851ae864319c404607e9f10b874df0e3f
 15f9e1d4f4595a72184d80cfb317402e5676eac9
+9dcfaf574c603be5533209cf591ed3c0c5f9b821