diff --git a/imagescrollarea.cpp b/imagescrollarea.cpp
index 2c06860..c467470 100644
--- a/imagescrollarea.cpp
+++ b/imagescrollarea.cpp
@@ -29,8 +29,8 @@ void ImageScrollArea::keyReleaseEvent(QKeyEvent *event)
 void ImageScrollArea::mouseMoveEvent(QMouseEvent *event)
 {
     QPoint delta = m_lastPos - event->pos();
-    horizontalScrollBar()->setValue(horizontalScrollBar()->value() - delta.x());
-    verticalScrollBar()->setValue(verticalScrollBar()->value() - delta.y());
+    horizontalScrollBar()->setValue(horizontalScrollBar()->value() + delta.x());
+    verticalScrollBar()->setValue(verticalScrollBar()->value() + delta.y());
     m_lastPos = event->pos();
 }