diff --git a/src/records.rs b/src/records.rs
index f09afc5..27ec65e 100644
--- a/src/records.rs
+++ b/src/records.rs
@@ -45,7 +45,7 @@ impl<'a> RecordsListRequestBuilder<'a> {
         }
         let per_page_opts = self.per_page.to_string();
         let page_opts = self.page.to_string();
-        build_opts.push(("per_page", per_page_opts.as_str()));
+        build_opts.push(("perPage", per_page_opts.as_str()));
         build_opts.push(("page", page_opts.as_str()));
 
         match Httpc::get(self.client, &url, Some(build_opts)) {