diff --git a/src/libtomahawk/album.cpp b/src/libtomahawk/album.cpp
index 7ca104c49..1ea9fe8c1 100644
--- a/src/libtomahawk/album.cpp
+++ b/src/libtomahawk/album.cpp
@@ -166,7 +166,7 @@ Album::cover( const QSize& size, bool forceLoad ) const
 
 
 void
-Album::infoSystemInfo( Tomahawk::InfoSystem::InfoRequestData requestData, QVariant output )
+Album::infoSystemInfo( const Tomahawk::InfoSystem::InfoRequestData& requestData, const QVariant& output )
 {
     if ( requestData.caller != m_uuid ||
          requestData.type != Tomahawk::InfoSystem::InfoAlbumCoverArt )
@@ -189,10 +189,8 @@ Album::infoSystemInfo( Tomahawk::InfoSystem::InfoRequestData requestData, QVaria
 
 
 void
-Album::infoSystemFinished( QString target )
+Album::infoSystemFinished( const QString& target )
 {
-    Q_UNUSED( target );
-
     if ( target != m_uuid )
         return;
 
diff --git a/src/libtomahawk/album.h b/src/libtomahawk/album.h
index 72b51fc07..42c6344bf 100644
--- a/src/libtomahawk/album.h
+++ b/src/libtomahawk/album.h
@@ -65,8 +65,8 @@ signals:
 private slots:
     void onTracksAdded( const QList<Tomahawk::query_ptr>& tracks );
 
-    void infoSystemInfo( Tomahawk::InfoSystem::InfoRequestData requestData, QVariant output );
-    void infoSystemFinished( QString target );
+    void infoSystemInfo( const Tomahawk::InfoSystem::InfoRequestData& requestData, const QVariant& output );
+    void infoSystemFinished( const QString& target );
 
 private:
     Q_DISABLE_COPY( Album )