diff --git a/.gitmodules b/.gitmodules
index 2beff77267e..d2c96ac901f 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -21,3 +21,6 @@
 [submodule "src/tools/cargo"]
 	path = src/tools/cargo
 	url = https://github.com/rust-lang/cargo
+[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 00000000000..2d23ea601f0
--- /dev/null
+++ b/src/doc/reference
@@ -0,0 +1 @@
+Subproject commit 2d23ea601f017c106a2303094ee1c57ba856d246