diff --git a/ChangeLog b/ChangeLog
index 7aa847d7b..556c1ec32 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,9 @@
 2005-09-18  Moritz Bunkus  <moritz@bunkus.org>
 
+	* mmg: bug fix: If a video track was selected that was appended to
+	another track then the aspect ratio drop down box was still
+	active.
+
 	* mkvmerge: new feature: MPEG-4 part 2 streams are searched for
 	the pixel width/height values. Those are taken if they differ from
 	those values in the source container. This is a work-around for
diff --git a/src/mmg/tab_input.cpp b/src/mmg/tab_input.cpp
index 9a4789fca..b2aee1c03 100644
--- a/src/mmg/tab_input.cpp
+++ b/src/mmg/tab_input.cpp
@@ -675,11 +675,11 @@ tab_input::enable_ar_controls(mmg_track_t *track) {
   bool ar_enabled;
 
   ar_enabled = !track->display_dimensions_selected;
-  cob_aspect_ratio->Enable(ar_enabled);
-  tc_display_width->Enable(!ar_enabled);
-  tc_display_height->Enable(!ar_enabled);
-  rb_aspect_ratio->SetValue(ar_enabled);
-  rb_display_dimensions->SetValue(!ar_enabled);
+  cob_aspect_ratio->Enable(ar_enabled && !track->appending);
+  tc_display_width->Enable(!ar_enabled && !track->appending);
+  tc_display_height->Enable(!ar_enabled && !track->appending);
+  rb_aspect_ratio->SetValue(ar_enabled && !track->appending);
+  rb_display_dimensions->SetValue(!ar_enabled && !track->appending);
 }
 
 void