diff --git a/modules/openapi-generator/src/main/resources/rust/reqwest/api.mustache b/modules/openapi-generator/src/main/resources/rust/reqwest/api.mustache
index 6dd9d1e3823..3bf87eff935 100644
--- a/modules/openapi-generator/src/main/resources/rust/reqwest/api.mustache
+++ b/modules/openapi-generator/src/main/resources/rust/reqwest/api.mustache
@@ -212,7 +212,7 @@ pub {{#supportAsync}}async {{/supportAsync}}fn {{{operationId}}}(configuration:
     {{/isNullable}}
     {{#isNullable}}
     match {{{paramName}}} {
-        Some(local_var_param_value) => { form = form.text("{{{baseName}}}", local_var_param_value{{#isArray}}.join(","){{/isArray}}.to_string()); },
+        Some(local_var_param_value) => { local_var_form = local_var_form.text("{{{baseName}}}", local_var_param_value{{#isArray}}.join(","){{/isArray}}.to_string()); },
         None => { local_var_form = local_var_form.text("{{{baseName}}}", ""); },
     }
     {{/isNullable}}