diff --git a/Cargo.lock b/Cargo.lock
index b18f38cc95f..d70cd576861 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -151,7 +151,7 @@ dependencies = [
 [[package]]
 name = "autocfg"
 version = "0.1.6"
-source = "git+https://github.com/servo/autocfg?branch=rustflags#d040e25ff6c129189306011f6a0ff210e08227a0"
+source = "git+https://github.com/servo/autocfg?branch=rustflags2#9142612f4b2599e6a858dc32cd3cbda5c98bd651"
 
 [[package]]
 name = "azure"
diff --git a/Cargo.toml b/Cargo.toml
index f054327d267..71b1163d2cf 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -30,6 +30,6 @@ mio = { git = "https://github.com/servo/mio.git", branch = "servo" }
 rand_os = { git = "https://github.com/servo/rand", branch = "servo-rand_os-0.1.3-uwp" }
 rand_core = { git = "https://github.com/servo/rand", branch = "servo-rand_os-0.1.3-uwp" }
 # https://github.com/cuviper/autocfg/pull/10
-autocfg = { git = "https://github.com/servo/autocfg", branch = "rustflags" }
+autocfg = { git = "https://github.com/servo/autocfg", branch = "rustflags2" }
 # https://github.com/retep998/winapi-rs/pull/816
 winapi = { git = "https://github.com/servo/winapi-rs", branch = "patch-1" }