diff --git a/modules/swagger-codegen/src/main/resources/rust/api.mustache b/modules/swagger-codegen/src/main/resources/rust/api.mustache
index 14da83f68e1..21c45ef38db 100644
--- a/modules/swagger-codegen/src/main/resources/rust/api.mustache
+++ b/modules/swagger-codegen/src/main/resources/rust/api.mustache
@@ -75,7 +75,7 @@ impl<C: hyper::client::Connect>{{classname}} for {{classname}}Client<C> {
 
         {{#hasBodyParam}}
         {{#bodyParams}}
-        let serialized = serde_json::to_string(&body).unwrap();
+        let serialized = serde_json::to_string(&{{paramName}}).unwrap();
         req.headers_mut().set(hyper::header::ContentType::json());
         req.headers_mut().set(hyper::header::ContentLength(serialized.len() as u64));
         req.set_body(serialized);