diff --git a/src/corelib/text/qstring.h b/src/corelib/text/qstring.h
index 45eb5f24742..b06afccc744 100644
--- a/src/corelib/text/qstring.h
+++ b/src/corelib/text/qstring.h
@@ -53,6 +53,7 @@
 #include <QtCore/qstringliteral.h>
 #include <QtCore/qstringalgorithms.h>
 #include <QtCore/qstringview.h>
+#include <QtCore/qstringtokenizer.h>
 
 #include <string>
 #include <iterator>