diff --git a/src/corelib/tools/qarraydataops.h b/src/corelib/tools/qarraydataops.h
index a864ac4c2b5..d4fd08d54c7 100644
--- a/src/corelib/tools/qarraydataops.h
+++ b/src/corelib/tools/qarraydataops.h
@@ -1255,7 +1255,20 @@ public:
     template <typename ...Args>
     void emplaceBack(Args&&... args)
     {
-        this->emplace(this->end(), std::forward<Args>(args)...);
+        Q_ASSERT(!this->isShared());
+        Q_ASSERT(this->freeSpaceAtEnd() >= 1);
+        new (this->end()) T(std::forward<Args>(args)...);
+        ++this->size;
+    }
+
+    template <typename ...Args>
+    void emplaceFront(Args&&... args)
+    {
+        Q_ASSERT(!this->isShared());
+        Q_ASSERT(this->freeSpaceAtBegin() >= 1);
+        new (this->ptr - 1) T(std::forward<Args>(args)...);
+        --this->ptr;
+        ++this->size;
     }
 
     void erase(T *b, T *e)
diff --git a/src/corelib/tools/qlist.h b/src/corelib/tools/qlist.h
index 3ea932c0fe2..0d29c459dff 100644
--- a/src/corelib/tools/qlist.h
+++ b/src/corelib/tools/qlist.h
@@ -711,15 +711,14 @@ inline typename QList<T>::reference QList<T>::emplaceFront(Args &&... args)
     if (d->needsDetach() || !d.freeSpaceAtBegin()) {
         DataPointer detached(DataPointer::allocateGrow(d, 1, QArrayData::AllocateAtBeginning));
 
-        detached->emplace(detached.begin(), std::forward<Args>(args)...);
+        detached->emplaceBack(std::forward<Args>(args)...);
         if (!d.needsDetach())
             detached->moveAppend(d.begin(), d.end());
         else
             detached->copyAppend(constBegin(), constEnd());
         d.swap(detached);
     } else {
-        // ### replace with emplaceFront
-        d->emplace(d.begin(), std::forward<Args>(args)...);
+        d->emplaceFront(std::forward<Args>(args)...);
     }
     return *d.begin();
 }
@@ -787,7 +786,7 @@ inline typename QList<T>::reference QList<T>::emplaceBack(Args &&... args)
             d->emplace(d.end(), std::move(tmp));
         }
     } else {
-        d->emplace(d.end(), std::forward<Args>(args)...);
+        d->emplaceBack(std::forward<Args>(args)...);
     }
     return *(d.end() - 1);
 }