diff --git a/ext/opencv/MotionCells.cpp b/ext/opencv/MotionCells.cpp
index 5eaa67feda..449fe24eed 100644
--- a/ext/opencv/MotionCells.cpp
+++ b/ext/opencv/MotionCells.cpp
@@ -75,7 +75,12 @@ MotionCells::MotionCells ()
   m_beta = 0.5;
   m_useAlpha = false;
   m_isVisible = false;
-
+  m_pCells = NULL;
+  m_gridx = 0;
+  m_gridy = 0;
+  m_cellwidth = 0;
+  m_cellheight = 0;
+  m_sensitivity = 0;
 }
 
 MotionCells::~MotionCells ()