diff --git a/lib/cache/src/filesystem.rs b/lib/cache/src/filesystem.rs
index 360ab5c21..1ae4cdbcb 100644
--- a/lib/cache/src/filesystem.rs
+++ b/lib/cache/src/filesystem.rs
@@ -22,7 +22,7 @@ use wasmer::{DeserializeError, Module, SerializeError, Store};
 ///     let mut fs_cache = FileSystemCache::new("some/directory/goes/here")?;
 ///
 ///     // Compute a key for a given WebAssembly binary
-///     let hash = Hash::generate(key);
+///     let hash = Hash::generate(bytes);
 ///
 ///     // Store a module into the cache given a key
 ///     fs_cache.store(key, module.clone())?;