diff --git a/.gitmodules b/.gitmodules
index 86c5c780c5eb2..652df5ea2abdd 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -18,3 +18,6 @@
 [submodule "src/liblibc"]
 	path = src/liblibc
 	url = https://github.com/rust-lang/libc.git
+[submodule "reference"]
+	path = src/doc/reference
+	url = https://github.com/rust-lang-nursery/reference.git
diff --git a/src/doc/reference b/src/doc/reference
new file mode 160000
index 0000000000000..2d23ea601f017
--- /dev/null
+++ b/src/doc/reference
@@ -0,0 +1 @@
+Subproject commit 2d23ea601f017c106a2303094ee1c57ba856d246