diff --git a/src/back/hlsl/mod.rs b/src/back/hlsl/mod.rs
index 27bec76e72..31273f6829 100644
--- a/src/back/hlsl/mod.rs
+++ b/src/back/hlsl/mod.rs
@@ -1,3 +1,11 @@
+//! HLSL shading language backend
+//!
+//! # Supported shader model versions:
+//! - 5.0
+//! - 5.1
+//! - 6.0
+//!
+
 mod keywords;
 mod writer;