diff --git a/src/primitives.rs b/src/primitives.rs
index 39019b3..48bd0e1 100644
--- a/src/primitives.rs
+++ b/src/primitives.rs
@@ -15,10 +15,13 @@
 use crate::either::Either;
 
 pub use activitystreams::primitives::{
-    Length, MimeMediaType, RdfLangString, XsdAnyUri, XsdDateTime, XsdDuration, XsdFloat,
+    MimeMediaType, MimeMediaTypeError, RdfLangString, XsdAnyUri, XsdAnyUriError, XsdDateTime,
+    XsdDateTimeError, XsdDuration, XsdDurationError, XsdFloat, XsdFloatError,
     XsdNonNegativeInteger, XsdString,
 };
 
+use activitystreams::primitives::Length;
+
 /// A type representing any kind of string
 ///
 /// In the ActivityStreams specification, string types are often defined as either an xsd:String or