diff --git a/src/gui/painting/qpainterpath.cpp b/src/gui/painting/qpainterpath.cpp
index cbe34c2857..d20faf89a2 100644
--- a/src/gui/painting/qpainterpath.cpp
+++ b/src/gui/painting/qpainterpath.cpp
@@ -675,8 +675,9 @@ void QPainterPath::reserve(int size)
 {
     Q_D(QPainterPath);
     if ((!d && size > 0) || (d && d->elements.capacity() < size)) {
+        ensureData();
         detach();
-        d->elements.reserve(size);
+        d_func()->elements.reserve(size);
     }
 }
 
diff --git a/tests/auto/gui/painting/qpainterpath/tst_qpainterpath.cpp b/tests/auto/gui/painting/qpainterpath/tst_qpainterpath.cpp
index 69c961c1a1..c90348e91a 100644
--- a/tests/auto/gui/painting/qpainterpath/tst_qpainterpath.cpp
+++ b/tests/auto/gui/painting/qpainterpath/tst_qpainterpath.cpp
@@ -189,6 +189,10 @@ void tst_QPainterPath::reserveAndCapacity()
 
     p.reserve(0);
     QVERIFY(p.capacity() >= 1000);
+
+    QPainterPath p2;
+    p2.reserve(10);
+    QVERIFY(p.capacity() >= 10);
 }
 
 Q_DECLARE_METATYPE(QPainterPath)