diff --git a/vk_generator/Cargo.toml b/vk_generator/Cargo.toml
index ea496df..4de34d0 100644
--- a/vk_generator/Cargo.toml
+++ b/vk_generator/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "vk_generator"
-version = "0.1.3"
+version = "0.2.0"
 authors = ["Osspial <osspial@gmail.com>"]
 
 description = "Generate Rust bindings to the Vulkan API"
diff --git a/vk_generator/src/generator/mod.rs b/vk_generator/src/generator/mod.rs
index a110596..9866408 100644
--- a/vk_generator/src/generator/mod.rs
+++ b/vk_generator/src/generator/mod.rs
@@ -135,6 +135,10 @@ impl<'a> GenConfig<'a> {
         self
     }
 
+    /// Whether or not to use the unstable `union` keyword to create native untagged unions.
+    /// Currently relies on the `untagged_unions` feature.
+    ///
+    /// Defaults to `false`.
     pub fn use_native_unions(mut self, use_native_unions: bool) -> GenConfig<'a> {
         self.use_native_unions = use_native_unions;
         self