diff --git a/vncviewer/DesktopWindow.cxx b/vncviewer/DesktopWindow.cxx
index fecf671..f35457d 100644
--- a/vncviewer/DesktopWindow.cxx
+++ b/vncviewer/DesktopWindow.cxx
@@ -360,7 +360,8 @@
           Fl::add_timeout(0.1, handleEdgeScroll, this);
       }
     }
-    return 1;
+    // Continue processing so that the viewport also gets mouse events
+    break;
 #endif
 
   case FL_SHORTCUT: