diff --git a/src/xlsx/xlsxworkbook_p.h b/src/xlsx/xlsxworkbook_p.h
index bf49635..8978784 100644
--- a/src/xlsx/xlsxworkbook_p.h
+++ b/src/xlsx/xlsxworkbook_p.h
@@ -40,6 +40,7 @@
 #include "xlsxtheme_p.h"
 #include <QSharedPointer>
 #include <QPair>
+#include <QStringList>
 
 namespace QXlsx {