diff --git a/src/data_forms.rs b/src/data_forms.rs
index d4678c0..bccdca0 100644
--- a/src/data_forms.rs
+++ b/src/data_forms.rs
@@ -72,7 +72,7 @@ impl From<Field> for Element {
                 .attr("label", field.label)
                 .append(if field.required { Some(Element::builder("required").ns(ns::DATA_FORMS).build()) } else { None })
                 .append(field.options)
-                .append(field.values.iter().map(|value| {
+                .append(field.values.into_iter().map(|value| {
                      Element::builder("value").ns(ns::DATA_FORMS).append(value).build()
                  }).collect::<Vec<_>>())
                 .append(field.media)
diff --git a/src/ibr.rs b/src/ibr.rs
index 37c54f7..59dc15d 100644
--- a/src/ibr.rs
+++ b/src/ibr.rs
@@ -69,8 +69,8 @@ impl From<Query> for Element {
         Element::builder("query")
                 .ns(ns::REGISTER)
                 .append(if query.registered { Some(Element::builder("registered").ns(ns::REGISTER)) } else { None })
-                .append(query.fields.iter().map(|(name, value)| {
-                     Element::builder(name.clone()).ns(ns::REGISTER).append(value.clone())
+                .append(query.fields.into_iter().map(|(name, value)| {
+                     Element::builder(name).ns(ns::REGISTER).append(value)
                  }).collect::<Vec<_>>())
                 .append(if query.remove { Some(Element::builder("remove").ns(ns::REGISTER)) } else { None })
                 .append(query.form)
diff --git a/src/message.rs b/src/message.rs
index 03fc2e8..bbb6a5e 100644
--- a/src/message.rs
+++ b/src/message.rs
@@ -207,7 +207,7 @@ impl From<Message> for Element {
                 .attr("to", message.to.and_then(|value| Some(String::from(value))))
                 .attr("id", message.id)
                 .attr("type", message.type_)
-                .append(message.subjects.iter()
+                .append(message.subjects.into_iter()
                                         .map(|(lang, subject)| {
                                              Element::builder("subject")
                                                      .ns(ns::JABBER_CLIENT)
@@ -218,7 +218,7 @@ impl From<Message> for Element {
                                                      .append(subject)
                                                      .build() })
                                         .collect::<Vec<_>>())
-                .append(message.bodies.iter()
+                .append(message.bodies.into_iter()
                                       .map(|(lang, body)| {
                                            Element::builder("body")
                                                    .ns(ns::JABBER_CLIENT)
diff --git a/src/presence.rs b/src/presence.rs
index a0147c7..098c401 100644
--- a/src/presence.rs
+++ b/src/presence.rs
@@ -321,7 +321,7 @@ impl From<Presence> for Element {
                 .attr("id", presence.id)
                 .attr("type", presence.type_)
                 .append(presence.show)
-                .append(presence.statuses.iter().map(|(lang, status)| {
+                .append(presence.statuses.into_iter().map(|(lang, status)| {
                      Element::builder("status")
                              .attr("xml:lang", match lang.as_ref() {
                                   "" => None,
diff --git a/src/roster.rs b/src/roster.rs
index 73522c2..a1ed2dc 100644
--- a/src/roster.rs
+++ b/src/roster.rs
@@ -65,7 +65,7 @@ impl From<Item> for Element {
                 .attr("jid", String::from(item.jid))
                 .attr("name", item.name)
                 .attr("subscription", item.subscription)
-                .append(item.groups.iter().map(|group| Element::builder("group").ns(ns::ROSTER).append(group)).collect::<Vec<_>>())
+                .append(item.groups.into_iter().map(|group| Element::builder("group").ns(ns::ROSTER).append(group)).collect::<Vec<_>>())
                 .build()
     }
 }