1 files changed, 7 insertions, 1 deletions
diff --git a/components/style/gecko_string_cache/namespace.rs b/components/style/gecko_string_cache/namespace.rs
index b2f464db184..a89c1873423 100644
--- a/components/style/gecko_string_cache/namespace.rs
+++ b/components/style/gecko_string_cache/namespace.rs
@@ -3,7 +3,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 use gecko_bindings::structs::nsIAtom;
-use std::borrow::Borrow;
+use std::borrow::{Borrow, Cow};
 use std::fmt;
 use std::ops::Deref;
 use string_cache::{Atom, WeakAtom};
@@ -31,6 +31,12 @@ impl Deref for Namespace {
     }
 }
 
+impl<'a> From<Cow<'a, str>> for Namespace {
+    fn from(s: Cow<'a, str>) -> Self {
+        Namespace(Atom::from(s))
+    }
+}
+
 impl fmt::Display for Namespace {
     fn fmt(&self, w: &mut fmt::Formatter) -> fmt::Result {
         self.0.fmt(w)