diff --git a/src/types.rs b/src/types.rs
index 854fba8..42b3450 100644
--- a/src/types.rs
+++ b/src/types.rs
@@ -316,7 +316,7 @@ impl Field {
         Map::new()
     }
 
-    fn valid_field(&self, name: VecDeque<NamePart>) -> Option<FieldTerminator> {
+    fn valid_field(&self, name: VecDeque<&NamePart>) -> Option<FieldTerminator> {
         trace!("Checking {:?} and {:?}", self, name);
         match *self {
             Field::Array(ref arr) => arr.valid_field(name),
@@ -376,7 +376,7 @@ impl Array {
         }
     }
 
-    fn valid_field(&self, mut name: VecDeque<NamePart>) -> Option<FieldTerminator> {
+    fn valid_field(&self, mut name: VecDeque<&NamePart>) -> Option<FieldTerminator> {
         trace!("Checking {:?} and {:?}", self, name);
         match name.pop_front() {
             Some(name_part) => match name_part {
@@ -428,14 +428,14 @@ impl Map {
         Field::Map(self)
     }
 
-    fn valid_field(&self, mut name: VecDeque<NamePart>) -> Option<FieldTerminator> {
+    fn valid_field(&self, mut name: VecDeque<&NamePart>) -> Option<FieldTerminator> {
         trace!("Checking {:?} and {:?}", self, name);
         match name.pop_front() {
             Some(name_part) => match name_part {
                 NamePart::Map(part_name) => self
                     .inner
                     .iter()
-                    .find(|&&(ref item, _)| *item == part_name)
+                    .find(|&&(ref item, _)| *item == *part_name)
                     .and_then(|&(_, ref field)| field.valid_field(name)),
                 _ => None,
             },
@@ -531,7 +531,7 @@ impl Form {
         self
     }
 
-    pub(crate) fn valid_field(&self, name: VecDeque<NamePart>) -> Option<FieldTerminator> {
+    pub(crate) fn valid_field(&self, name: VecDeque<&NamePart>) -> Option<FieldTerminator> {
         self.inner.valid_field(name.clone())
     }
 }
diff --git a/src/upload.rs b/src/upload.rs
index b4b7531..2a15a52 100644
--- a/src/upload.rs
+++ b/src/upload.rs
@@ -193,7 +193,7 @@ async fn handle_stream_field(
     let name = parse_multipart_name(name)?;
 
     let term = form
-        .valid_field(name.iter().cloned().collect())
+        .valid_field(name.iter().collect())
         .ok_or(Error::FieldType)?;
 
     let content = match term {