diff --git a/src/Tracker/trajectory.h b/src/Tracker/trajectory.h
index 323d9343..9b4dd22a 100644
--- a/src/Tracker/trajectory.h
+++ b/src/Tracker/trajectory.h
@@ -152,6 +152,14 @@ class Trace
             m_trace.clear();
     }
 
+    ///
+    /// \brief pop_back
+    ///
+    void pop_back()
+    {
+        m_trace.pop_back();
+    }
+
     ///
     /// \brief GetRawCount
     /// \param lastPeriod