diff --git a/ChangeLog b/ChangeLog
index 8f3ab84b3..eb759c5d2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2005-01-20  Moritz Bunkus  <moritz@bunkus.org>
+
+	* mmg: bug fix: The "stretch" input box tooltip was wrong. The
+	resulting command line was broken, too.
+
 2005-01-08  Moritz Bunkus  <moritz@bunkus.org>
 
 	* mmg: new feature: Made the mkvmerge GUI guide available by
diff --git a/src/mmg/mmg.cpp b/src/mmg/mmg.cpp
index 8c88a5c82..fb1a6af16 100644
--- a/src/mmg/mmg.cpp
+++ b/src/mmg/mmg.cpp
@@ -1283,8 +1283,11 @@ mmg_dialog::update_command_line() {
           arg += t->delay;
         else
           arg += wxT("0");
-        if (t->stretch.Length() > 0)
-          arg += wxT(",") + t->stretch + wxT("/1");
+        if (t->stretch.Length() > 0) {
+          arg += wxT(",") + t->stretch;
+          if (t->stretch.Find(wxT("/")) < 0)
+            arg += wxT("/1");
+        }
         clargs.Add(wxT("--sync"));
         clargs.Add(arg);
       }
diff --git a/src/mmg/tab_input.cpp b/src/mmg/tab_input.cpp
index 49a09f0f8..e4c53bf87 100644
--- a/src/mmg/tab_input.cpp
+++ b/src/mmg/tab_input.cpp
@@ -248,9 +248,10 @@ tab_input::tab_input(wxWindow *parent):
   siz_fg->Add(st_stretch, 0, wxALIGN_CENTER_VERTICAL | wxRIGHT, 10);
   tc_stretch = new wxTextCtrl(this, ID_TC_STRETCH, wxT(""));
   tc_stretch->SetToolTip(TIP("Stretch the audio or subtitle track by a "
-                             "factor. This should be a positive floating "
-                             "point number. Not all formats can be stretched "
-                             "at the moment."));
+                             "factor. This entry can have two formats. It is "
+                             "either a positive floating point number, or a "
+                             "fraction like e.g. 1200/1253. Not all formats "
+                             "can be stretched at the moment."));
   tc_stretch->SetSizeHints(0, -1);
   siz_fg->Add(tc_stretch, 0, wxGROW, 0);