diff --git a/src/libtomahawk/database/DatabaseImpl.cpp b/src/libtomahawk/database/DatabaseImpl.cpp
index ff65e8cc5..4648a988a 100644
--- a/src/libtomahawk/database/DatabaseImpl.cpp
+++ b/src/libtomahawk/database/DatabaseImpl.cpp
@@ -131,6 +131,8 @@ DatabaseImpl::~DatabaseImpl()
 DatabaseImpl*
 DatabaseImpl::clone() const
 {
+    QMutexLocker lock( &m_mutex );
+
     DatabaseImpl* impl = new DatabaseImpl( m_parent, m_db.databaseName() );
     impl->setDatabaseID( m_dbid );
     impl->setFuzzyIndex( m_fuzzyIndex );
diff --git a/src/libtomahawk/database/DatabaseImpl.h b/src/libtomahawk/database/DatabaseImpl.h
index 9dfe213e5..47b921d33 100644
--- a/src/libtomahawk/database/DatabaseImpl.h
+++ b/src/libtomahawk/database/DatabaseImpl.h
@@ -101,6 +101,7 @@ private:
 
     QString m_dbid;
     FuzzyIndex* m_fuzzyIndex;
+    mutable QMutex m_mutex;
 };
 
 #endif // DATABASEIMPL_H