diff --git a/.gitmodules b/.gitmodules
index 2d4004c1..951d0983 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -7,3 +7,6 @@
 [submodule "lib/addon-sdk-1.0"]
 	path = lib/addon-sdk-1.0
 	url = git://github.com/mozilla/addon-sdk.git
+[submodule "lib/addon-sdk-1.1rc1"]
+	path = lib/addon-sdk-1.1rc1
+	url = git://github.com/mozilla/addon-sdk.git
diff --git a/lib/addon-sdk-1.1rc1 b/lib/addon-sdk-1.1rc1
new file mode 160000
index 00000000..4cd0c392
--- /dev/null
+++ b/lib/addon-sdk-1.1rc1
@@ -0,0 +1 @@
+Subproject commit 4cd0c39219e3bb5dc1c1c8ea0676304807d8fe27