diff --git a/src/LabelTrack.cpp b/src/LabelTrack.cpp
index 7fc52314b..d3d6842bd 100644
--- a/src/LabelTrack.cpp
+++ b/src/LabelTrack.cpp
@@ -846,6 +846,24 @@ bool LabelTrack::Repeat(double t0, double t1, int n)
    return true;
 }
 
+void LabelTrack::SyncLockAdjust(double oldT1, double newT1)
+{
+   if (newT1 > oldT1) {
+      // Insert space within the track
+
+      if (oldT1 > GetEndTime())
+         return;
+
+      //Clear(oldT1, newT1);
+      ShiftLabelsOnInsert(newT1 - oldT1, oldT1);
+   }
+   else if (newT1 < oldT1) {
+      // Remove from the track
+      Clear(newT1, oldT1);
+   }
+}
+
+
 void LabelTrack::Silence(double t0, double t1)
 {
    int len = mLabels.size();
diff --git a/src/LabelTrack.h b/src/LabelTrack.h
index c4b99940f..aff64535a 100644
--- a/src/LabelTrack.h
+++ b/src/LabelTrack.h
@@ -123,6 +123,7 @@ public:
    void Clear(double t0, double t1) override;
    void Paste(double t, const Track * src) override;
    bool Repeat(double t0, double t1, int n);
+   void SyncLockAdjust(double oldT1, double newT1) override;
 
    void Silence(double t0, double t1) override;
    void InsertSilence(double t, double len) override;