diff --git a/Cargo.lock b/Cargo.lock
index e4a50e10..5ab0435d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -106,7 +106,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 name = "librespot-protocol"
 version = "0.1.0"
 dependencies = [
- "mod_path 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "mod_path 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "protobuf 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -120,7 +120,7 @@ dependencies = [
 
 [[package]]
 name = "mod_path"
-version = "0.1.5"
+version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -174,7 +174,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 [[package]]
 name = "protobuf_macros"
 version = "0.1.0"
-source = "git+https://github.com/plietar/rust-protobuf-macros.git#2b6a8129e015945300cb2bb7efae2ed78042ed48"
+source = "git+https://github.com/plietar/rust-protobuf-macros.git#4f4a16e3e643caf0566ca0a97d65b46b509ee542"
 
 [[package]]
 name = "rand"
diff --git a/README.md b/README.md
index b8d644a7..0360dabb 100644
--- a/README.md
+++ b/README.md
@@ -16,6 +16,9 @@ You will also need the protobuf compiler, and the
 [rust-protobuf](https://github.com/stepancheg/rust-protobuf) plugin.
 `protoc-gen-rust` must be in your `$PATH`.
 
+Also required is an installation of [portaudio](http://portaudio.com/), which
+can be installed via `brew install portaudio` for an OS X machine.
+
 Once you've cloned this repository you can build *librespot* using `cargo`.
 ```shell
 cargo build
diff --git a/cache/.gitignore b/cache/.gitignore
new file mode 100644
index 00000000..d6b7ef32
--- /dev/null
+++ b/cache/.gitignore
@@ -0,0 +1,2 @@
+*
+!.gitignore
diff --git a/protocol/Cargo.toml b/protocol/Cargo.toml
index 2089b4fe..0a078eb7 100644
--- a/protocol/Cargo.toml
+++ b/protocol/Cargo.toml
@@ -5,6 +5,6 @@ authors = ["Paul Liétar <paul@lietar.net>"]
 build = "build.rs"
 
 [dependencies]
-mod_path = "~0.1.5"
+mod_path = "~0.1.6"
 protobuf = "~1.0.4"
 
diff --git a/src/player.rs b/src/player.rs
index 0addce23..5d455b0a 100644
--- a/src/player.rs
+++ b/src/player.rs
@@ -76,7 +76,7 @@ impl PlayerInternal {
     fn run(self) {
         portaudio::initialize().unwrap();
 
-        let stream = portaudio::stream::Stream::<i16>::open_default(
+        let stream = portaudio::stream::Stream::<i16, i16>::open_default(
                 0, 2, 44100.0,
                 portaudio::stream::FRAMES_PER_BUFFER_UNSPECIFIED,
                 None