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-rw-r--r--src/corelib/tools/qstring.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/corelib/tools/qstring.h b/src/corelib/tools/qstring.h
index 6c9a3cab35..74f93a4ca0 100644
--- a/src/corelib/tools/qstring.h
+++ b/src/corelib/tools/qstring.h
@@ -631,6 +631,7 @@ private:
friend class QCharRef;
friend class QTextCodec;
friend class QStringRef;
+ friend struct QAbstractConcatenable;
friend inline bool qStringComparisonHelper(const QString &s1, const char *s2);
friend inline bool qStringComparisonHelper(const QStringRef &s1, const char *s2);
public: