diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 6a9f749e65a..afb57610914 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -175,6 +175,7 @@ pub fn register_plugins(reg: &mut rustc_plugin::Registry) {
 
 The [`rustc_plugin::PluginRegistry`][plugin_registry] provides two methods to register lints: [register_early_lint_pass][reg_early_lint_pass] and [register_late_lint_pass][reg_late_lint_pass].
 Both take an object that implements an [`EarlyLintPass`][early_lint_pass] or [`LateLintPass`][late_lint_pass] respectively. This is done in every single lint. 
+It's worth noting that the majority of `clippy_lints/src/lib.rs` is autogenerated by `util/update_lints.py` and you don't have to add anything by hand. When you are writing your own lint, you can use that script to save you some time.
 
 ```rust
 // ./clippy_lints/src/else_if_without_else.rs