diff --git a/src/scrollzoomer.cpp b/src/scrollzoomer.cpp
--- a/src/scrollzoomer.cpp
+++ b/src/scrollzoomer.cpp
@@ -424,7 +424,7 @@ void ScrollZoomer::updateScrollBars()
         ScrollBar *sb = scrollBar( Qt::Vertical );
         sb->setPalette( plot()->palette() );
         sb->setInverted( plot()->axisScaleDiv( yAxis ).isIncreasing() );
-        sb->setBase( zoomRect().top(), zoomRect().bottom() );
+        sb->setBase( zoomBase().top(), zoomBase().bottom() );
         sb->moveSlider( zoomRect().top(), zoomRect().bottom() );
 
         if ( !sb->isVisibleTo( canvas() ) )