diff --git a/NEWS b/NEWS
index 7fd5808..0652748 100644
--- a/NEWS
+++ b/NEWS
@@ -1,6 +1,7 @@
 Version TBD
  - Fixed checking for the shift key when selecting.
  - Terminals are ignored when hovering the cursor above a selection.
+ - Disallowed wheel zooming when holding mouse buttons.
 
 Version 0.1.2
  - Updated symbol library.
diff --git a/liblogdiag/ld-diagram-view.c b/liblogdiag/ld-diagram-view.c
index 18912f4..e28ec7a 100644
--- a/liblogdiag/ld-diagram-view.c
+++ b/liblogdiag/ld-diagram-view.c
@@ -2298,6 +2298,10 @@ on_scroll (GtkWidget *widget, GdkEventScroll *event, gpointer user_data)
 	point.y = event->y;
 	self = LD_DIAGRAM_VIEW (widget);
 
+	if (self->priv->operation != OPER_0
+		&& self->priv->operation != OPER_ADD_OBJECT)
+		return TRUE;
+
 	ld_diagram_view_widget_to_diagram_coords (self,
 		event->x, event->y, &prev_x, &prev_y);