diff --git a/src/plugins/platforms/windows/qwindowscursor.cpp b/src/plugins/platforms/windows/qwindowscursor.cpp
index e1d1183cd58..b4168861206 100644
--- a/src/plugins/platforms/windows/qwindowscursor.cpp
+++ b/src/plugins/platforms/windows/qwindowscursor.cpp
@@ -105,14 +105,16 @@ static HCURSOR createBitmapCursor(const QImage &bbits, const QImage &mbits,
         hotSpot.setX(width / 2);
     if (hotSpot.y() < 0)
         hotSpot.setY(height / 2);
-    const int n = qMax(1, width / 8);
-    QScopedArrayPointer<uchar> xBits(new uchar[height * n]);
-    QScopedArrayPointer<uchar> xMask(new uchar[height * n]);
+    // a ddb is word aligned, QImage depends on bow it was created
+    const auto bplDdb = qMax(1, ((width + 15) >> 4) << 1);
+    const auto bplImg = int(bbits.bytesPerLine());
+    QScopedArrayPointer<uchar> xBits(new uchar[height * bplDdb]);
+    QScopedArrayPointer<uchar> xMask(new uchar[height * bplDdb]);
     int x = 0;
     for (int i = 0; i < height; ++i) {
         const uchar *bits = bbits.constScanLine(i);
         const uchar *mask = mbits.constScanLine(i);
-        for (int j = 0; j < n; ++j) {
+        for (int j = 0; j < bplImg && j < bplDdb; ++j) {
             uchar b = bits[j];
             uchar m = mask[j];
             if (invb)
@@ -123,6 +125,11 @@ static HCURSOR createBitmapCursor(const QImage &bbits, const QImage &mbits,
             xMask[x] = b ^ m;
             ++x;
         }
+        for (int i = bplImg; i < bplDdb; ++i) {
+            xBits[x] = 0;
+            xMask[x] = 0;
+            ++x;
+        }
     }
     return CreateCursor(GetModuleHandle(nullptr), hotSpot.x(), hotSpot.y(), width, height,
                         xBits.data(), xMask.data());