1 files changed, 7 insertions, 0 deletions
diff --git a/components/script/dom/bindings/num.rs b/components/script/dom/bindings/num.rs
index c7d24f4fb83..f7604cfab20 100644
--- a/components/script/dom/bindings/num.rs
+++ b/components/script/dom/bindings/num.rs
@@ -6,6 +6,7 @@
 
 use heapsize::HeapSizeOf;
 use num_traits::Float;
+use std::default::Default;
 use std::ops::Deref;
 
 /// Encapsulates the IDL restricted float type.
@@ -45,3 +46,9 @@ impl<T: Float + HeapSizeOf> HeapSizeOf for Finite<T> {
         (**self).heap_size_of_children()
     }
 }
+
+impl<T: Float + Default> Default for Finite<T> {
+    fn default() -> Finite<T> {
+        Finite::wrap(T::default())
+    }
+}