diff --git a/Contents/Resources/impl-generator-bin b/Contents/Resources/impl-generator-bin
index 6ebafb1..bee8f17 100755
Binary files a/Contents/Resources/impl-generator-bin and b/Contents/Resources/impl-generator-bin differ
diff --git a/impl-generator/src/main.rs b/impl-generator/src/main.rs
index a1b0487..ee76f5f 100644
--- a/impl-generator/src/main.rs
+++ b/impl-generator/src/main.rs
@@ -463,7 +463,7 @@ fn format() -> Vec<Component<'static>> {
     vec![
         Component::Function {
             name: "fmt",
-            input: "&self, &mut fmt::Formatter",
+            input: "&self, f: &mut fmt::Formatter",
             output: Some("Result<(), fmt::Error>"),
             params: None,
         }