diff --git a/Cargo.toml b/Cargo.toml
index 565eead9..2c1f8892 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -61,3 +61,8 @@ name = "proto"
 path = "benches/encoding/proto.rs"
 harness = false
 required-features = ["protobuf"]
+
+# Passing arguments to the docsrs builder in order to properly document cfg's.
+# More information: https://docs.rs/about/builds#cross-compiling
+[package.metadata.docs.rs]
+all-features = true
diff --git a/src/encoding.rs b/src/encoding.rs
index 23c60328..30993999 100644
--- a/src/encoding.rs
+++ b/src/encoding.rs
@@ -13,6 +13,7 @@ use std::rc::Rc;
 use std::sync::Arc;
 
 #[cfg(feature = "protobuf")]
+#[cfg_attr(docsrs, doc(cfg(feature = "protobuf")))]
 pub mod protobuf;
 pub mod text;
 
diff --git a/src/lib.rs b/src/lib.rs
index cf39dc1a..cfff6238 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -3,6 +3,7 @@
 #![deny(unused)]
 #![forbid(unsafe_code)]
 #![warn(missing_debug_implementations)]
+#![cfg_attr(docsrs, feature(doc_cfg))]
 
 //! Client library implementation of the [Open Metrics
 //! specification](https://github.com/OpenObservability/OpenMetrics). Allows