diff --git a/src/corelib/tools/qsharedpointer.cpp b/src/corelib/tools/qsharedpointer.cpp
index 44cbad94f7a..ef921a8284b 100644
--- a/src/corelib/tools/qsharedpointer.cpp
+++ b/src/corelib/tools/qsharedpointer.cpp
@@ -1400,7 +1400,7 @@ QtSharedPointer::ExternalRefCountData *QtSharedPointer::ExternalRefCountData::ge
     }
 
     // we can create the refcount data because it doesn't exist
-    ExternalRefCountData *x = new ExternalRefCountData(Qt::Uninitialized);
+    ExternalRefCountData *x = ::new ExternalRefCountData(Qt::Uninitialized);
     x->strongref.storeRelaxed(-1);
     x->weakref.storeRelaxed(2);  // the QWeakPointer that called us plus the QObject itself
 
@@ -1411,7 +1411,7 @@ QtSharedPointer::ExternalRefCountData *QtSharedPointer::ExternalRefCountData::ge
         // ~ExternalRefCountData has a Q_ASSERT, so we use this trick to
         // only execute this if Q_ASSERTs are enabled
         Q_ASSERT((x->weakref.storeRelaxed(0), true));
-        delete x;
+        ::delete x;
         ret->weakref.ref();
     }
     return ret;
diff --git a/src/corelib/tools/qsharedpointer_impl.h b/src/corelib/tools/qsharedpointer_impl.h
index 222aecb0187..994c631d76c 100644
--- a/src/corelib/tools/qsharedpointer_impl.h
+++ b/src/corelib/tools/qsharedpointer_impl.h
@@ -153,6 +153,12 @@ namespace QtSharedPointer {
         inline void checkQObjectShared(...) { }
         inline void setQObjectShared(...) { }
 
+        // Normally, only subclasses of ExternalRefCountData are allocated
+        // One exception exists in getAndRef; that uses the global operator new
+        // to prevent a mismatch with the custom operator delete
+        inline void *operator new(std::size_t) = delete;
+        // placement new
+        inline void *operator new(std::size_t, void *ptr) noexcept { return ptr; }
         inline void operator delete(void *ptr) { ::operator delete(ptr); }
         inline void operator delete(void *, void *) { }
     };