1 files changed, 3 insertions, 2 deletions
diff --git a/src/platformsupport/fbconvenience/qfbscreen.cpp b/src/platformsupport/fbconvenience/qfbscreen.cpp
index 566f84c9ea..d00954375d 100644
--- a/src/platformsupport/fbconvenience/qfbscreen.cpp
+++ b/src/platformsupport/fbconvenience/qfbscreen.cpp
@@ -206,10 +206,11 @@ void QFbScreen::generateRects()
         }
 #endif
     }
-    foreach (const QRect &rect, remainingScreen.rects())
+    const QVector<QRect> remainingScreenRects = remainingScreen.rects();
+    mCachedRects.reserve(mCachedRects.count() + remainingScreenRects.count());
+    foreach (const QRect &rect, remainingScreenRects)
         mCachedRects += QPair<QRect, int>(rect, -1);
     mIsUpToDate = true;
-    return;
 }
 
 QRegion QFbScreen::doRedraw()