diff --git a/kdvi_multipage.cpp b/kdvi_multipage.cpp
index 0bca5ffc6..d414cc63d 100644
--- a/kdvi_multipage.cpp
+++ b/kdvi_multipage.cpp
@@ -126,10 +126,12 @@ bool KDVIMultiPage::gotoPage(int page)
 }
 
 
-void KDVIMultiPage::setZoom(double zoom)
+double KDVIMultiPage::setZoom(double zoom)
 {
   window->setZoom(zoom);
   scrollView()->resizeContents(window->width(), window->height());
+
+  return zoom;
 }
 
 
diff --git a/kdvi_multipage.h b/kdvi_multipage.h
index 28fd3c47e..e807e1201 100644
--- a/kdvi_multipage.h
+++ b/kdvi_multipage.h
@@ -68,7 +68,7 @@ public:
   virtual bool gotoPage(int page); 
 
   /// sets a zoom factor
-  virtual void setZoom(double z); 
+  virtual double setZoom(double z); 
 
   /// calculates the zoom needed to fit into a given width
   virtual double zoomForWidth(int width);