diff --git a/ci/script.sh b/ci/script.sh
index 0244c58171..3dd60de326 100644
--- a/ci/script.sh
+++ b/ci/script.sh
@@ -118,6 +118,10 @@ if [ -z ${TRAVIS_RUST_VERSION-} ]; then
     esac
 fi
 
+if [ -z ${TARGET-} ]; then
+    TARGET=$(rustc -Vv | grep host | cut -d ' ' -f2)
+fi
+
 if [ $TRAVIS_BRANCH != master ] || [ $TRAVIS_PULL_REQUEST != false ]; then
     main
 fi
diff --git a/src/lib.rs b/src/lib.rs
index 6aad041ea5..4756702e6e 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -197,7 +197,7 @@ impl PartialOrd for Instant {
 /// A `Duration` type to represent a span of time.
 ///
 /// This data type is only available when the `timer-queue` feature is enabled
-#[derive(Clone, Copy, Eq, Ord, PartialEq, PartialOrd)]
+#[derive(Clone, Copy, Default, Eq, Ord, PartialEq, PartialOrd)]
 #[cfg(feature = "timer-queue")]
 pub struct Duration(u32);