diff --git a/lib/entry/libimagentrydatetime/src/datetime.rs b/lib/entry/libimagentrydatetime/src/datetime.rs
index 611e5dbd..d7fcb828 100644
--- a/lib/entry/libimagentrydatetime/src/datetime.rs
+++ b/lib/entry/libimagentrydatetime/src/datetime.rs
@@ -92,6 +92,9 @@ impl EntryDate for Entry {
 
         self.get_header_mut()
             .insert(&DATE_HEADER_LOCATION, Value::String(date))
+            .context(format_err!("Failed to insert header '{}' in '{}'",
+                                 *DATE_HEADER_LOCATION,
+                                 self.get_location()))
             .map_err(Error::from)
             .map(|opt| opt.map(|stri| {
                 stri.as_str()
diff --git a/lib/entry/libimagentrydatetime/src/lib.rs b/lib/entry/libimagentrydatetime/src/lib.rs
index ede8b862..3e16e031 100644
--- a/lib/entry/libimagentrydatetime/src/lib.rs
+++ b/lib/entry/libimagentrydatetime/src/lib.rs
@@ -38,10 +38,10 @@
 )]
 
 #[macro_use] extern crate lazy_static;
+#[macro_use] extern crate failure;
 extern crate chrono;
 extern crate toml_query;
 extern crate toml;
-extern crate failure;
 
 extern crate libimagerror;
 extern crate libimagstore;