diff --git a/index.d.ts b/index.d.ts
index 9b08de9..aa31e57 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -1 +1,4 @@
-export const diff: (left: string, right: string) => []
+export const diffChars: (
+  left: string,
+  right: string,
+) => [{ count: number; value: string; added: boolean; removed: boolean }]
diff --git a/src/lib.rs b/src/lib.rs
index 59177df..b3c2d02 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -16,7 +16,7 @@ static ALLOC: jemallocator::Jemalloc = jemallocator::Jemalloc;
 register_module!(example, init);
 
 fn init(module: &mut Module) -> Result<()> {
-  module.create_named_method("diff", diff_char)?;
+  module.create_named_method("diffChars", diff_char)?;
   Ok(())
 }