diff --git a/Cargo.toml b/Cargo.toml
index 7fd6144..a61366b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,6 +6,7 @@ authors = ["The Rust Project Developers"]
 license = "MIT/Apache-2.0"
 homepage = "https://github.com/rust-lang/num"
 repository = "https://github.com/rust-lang/num"
+documentation = "http://doc.rust-lang.org/num"
 keywords = ["mathematics", "numerics"]
 description = """
 Simple numerics. This crate contains basic arbitrary-sized integer,
diff --git a/README.md b/README.md
index 9763a73..413ad08 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,8 @@
 
 Arbitrary sized numeric types for Rust.
 
+[Documentation](http://doc.rust-lang.org/num)
+
 ## Usage
 
 Add this to your `Cargo.toml`: