diff --git a/.gitignore b/.gitignore
index a821aa9921..173b951426 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,4 @@
-
 /target
 **/*.rs.bk
 Cargo.lock
+.vscode
diff --git a/Cargo.toml b/Cargo.toml
index 9542882427..8038a668ea 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -4,8 +4,9 @@ version = "0.1.0"
 authors = ["Dzmitry Malyshau <kvark@mozilla.com>"]
 
 [features]
-default = ["gfx-backend-vulkan"]
 
 [dependencies]
 gfx-hal = { git = "https://github.com/gfx-rs/gfx" }
 gfx-backend-vulkan = { git = "https://github.com/gfx-rs/gfx", optional = true }
+gfx-backend-dx12 = { git = "https://github.com/gfx-rs/gfx", optional = true }
+gfx-backend-metal = { git = "https://github.com/gfx-rs/gfx", optional = true }
diff --git a/src/instance.rs b/src/instance.rs
index a9266011b2..055c0cd865 100644
--- a/src/instance.rs
+++ b/src/instance.rs
@@ -14,7 +14,7 @@ pub struct AdapterDescriptor {
 
 #[repr(C)]
 pub struct Extensions {
-    anisotropicFiltering: bool,
+    anisotropic_filtering: bool,
 }
 
 #[repr(C)]
diff --git a/src/lib.rs b/src/lib.rs
index af237c19b6..ad15c58203 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,6 +1,10 @@
 extern crate gfx_hal as hal;
 #[cfg(feature = "gfx-backend-vulkan")]
 extern crate gfx_backend_vulkan as back;
+#[cfg(feature = "gfx-backend-dx12")]
+extern crate gfx_backend_dx12 as back;
+#[cfg(feature = "gfx-backend-metal")]
+extern crate gfx_backend_metal as back;
 
 mod command;
 mod device;