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diff --git a/src/commands/segment/AddTimeSignatureAndNormalizeCommand.cpp b/src/commands/segment/AddTimeSignatureAndNormalizeCommand.cpp
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+++ b/src/commands/segment/AddTimeSignatureAndNormalizeCommand.cpp
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+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
+
+/*
+    Rosegarden
+    A MIDI and audio sequencer and musical notation editor.
+ 
+    This program is Copyright 2000-2008
+        Guillaume Laurent   <[email protected]>,
+        Chris Cannam        <[email protected]>,
+        Richard Bown        <[email protected]>
+ 
+    The moral rights of Guillaume Laurent, Chris Cannam, and Richard
+    Bown to claim authorship of this work have been asserted.
+ 
+    Other copyrights also apply to some parts of this work.  Please
+    see the AUTHORS file and individual file headers for details.
+ 
+    This program is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License as
+    published by the Free Software Foundation; either version 2 of the
+    License, or (at your option) any later version.  See the file
+    COPYING included with this distribution for more information.
+*/
+
+
+#include "AddTimeSignatureAndNormalizeCommand.h"
+
+#include "AddTimeSignatureCommand.h"
+#include "base/Composition.h"
+#include "base/NotationTypes.h"
+#include "commands/notation/MakeRegionViableCommand.h"
+
+
+namespace Rosegarden
+{
+
+AddTimeSignatureAndNormalizeCommand::AddTimeSignatureAndNormalizeCommand
+(Composition *composition, timeT time, TimeSignature timeSig) :
+        KMacroCommand(AddTimeSignatureCommand::getGlobalName())
+{
+    addCommand(new AddTimeSignatureCommand(composition, time, timeSig));
+
+    // only up to the next time signature
+    timeT nextTimeSigTime(composition->getDuration());
+
+    int index = composition->getTimeSignatureNumberAt(time);
+    if (composition->getTimeSignatureCount() > index + 1) {
+        nextTimeSigTime = composition->getTimeSignatureChange(index + 1).first;
+    }
+
+    for (Composition::iterator i = composition->begin();
+         i != composition->end(); ++i) {
+
+        if ((*i)->getType() != Segment::Internal) continue;
+
+        timeT startTime = (*i)->getStartTime();
+        timeT endTime = (*i)->getEndTime();
+
+        if (startTime >= nextTimeSigTime || endTime <= time)
+            continue;
+
+        // "Make Notes Viable" splits and ties notes at barlines, and
+        // also does a rest normalize.  It's what we normally want
+        // when adding a time signature.
+
+        addCommand(new MakeRegionViableCommand
+                   (**i,
+                    std::max(startTime, time),
+                    std::min(endTime, nextTimeSigTime)));
+    }
+}
+
+AddTimeSignatureAndNormalizeCommand::~AddTimeSignatureAndNormalizeCommand()
+{
+    // well, nothing really
+}
+
+}