diff --git a/src/corelib/thread/qfutureinterface.cpp b/src/corelib/thread/qfutureinterface.cpp
index e85f632fdf3..bad55811fe7 100644
--- a/src/corelib/thread/qfutureinterface.cpp
+++ b/src/corelib/thread/qfutureinterface.cpp
@@ -414,11 +414,6 @@ QFutureInterfaceBase &QFutureInterfaceBase::operator=(const QFutureInterfaceBase
     return *this;
 }
 
-bool QFutureInterfaceBase::referenceCountIsOne() const
-{
-    return d->refCount.load() == 1;
-}
-
 bool QFutureInterfaceBase::refT() const
 {
     return d->refCount.refT();
diff --git a/src/corelib/thread/qfutureinterface.h b/src/corelib/thread/qfutureinterface.h
index 3cbb9506ecc..ea39c86f123 100644
--- a/src/corelib/thread/qfutureinterface.h
+++ b/src/corelib/thread/qfutureinterface.h
@@ -129,7 +129,6 @@ public:
     QFutureInterfaceBase &operator=(const QFutureInterfaceBase &other);
 
 protected:
-    bool referenceCountIsOne() const;
     bool refT() const;
     bool derefT() const;
 public: