1 files changed, 2 insertions, 1 deletions
diff --git a/src/ser.rs b/src/ser.rs
index 50d3688..a9f046d 100644
--- a/src/ser.rs
+++ b/src/ser.rs
@@ -124,7 +124,8 @@ fn replace_space(input: &str) -> Cow<str> {
 impl<'a, W: 'a + Write> QsSerializer<'a, W> {
     fn extend_key(&mut self, newkey: &str) {
         let newkey =
-            percent_encode(replace_space(newkey).as_bytes(), QS_ENCODE_SET).collect::<Cow<str>>();
+            percent_encode(newkey.as_bytes(), QS_ENCODE_SET)
+            .collect::<Cow<str>>();
         let key = if let Some(ref key) = self.key {
             format!("{}[{}]", key, newkey).into()
         } else {