diff --git a/src/core/musichoard/base.rs b/src/core/musichoard/base.rs
index c405e9b..e8daf36 100644
--- a/src/core/musichoard/base.rs
+++ b/src/core/musichoard/base.rs
@@ -70,18 +70,18 @@ impl<Database, Library> IMusicHoardBasePrivate for MusicHoard<Database, Library>
     }
 
     fn merge_collections<It: IntoIterator<Item = Artist>>(&self, database: It) -> Collection {
-        let mut primary_map = NormalMap::<Artist>::new();
-        let mut secondary_map = NormalMap::<Artist>::new();
+        let mut primary = NormalMap::<Artist>::new();
+        let mut secondary = NormalMap::<Artist>::new();
 
         for artist in self.library_cache.iter().cloned() {
-            primary_map.insert(string::normalize_string(&artist.meta.id.name), artist);
+            primary.insert(string::normalize_string(&artist.meta.id.name), artist);
         }
 
         for artist in database.into_iter() {
-            secondary_map.insert(string::normalize_string(&artist.meta.id.name), artist);
+            secondary.insert(string::normalize_string(&artist.meta.id.name), artist);
         }
 
-        let mut collection = MergeCollections::merge_by_name(primary_map, secondary_map);
+        let mut collection = MergeCollections::merge_by_name(primary, secondary);
         collection.sort_unstable();
 
         collection