diff --git a/src/OpticalFlow.cpp b/src/OpticalFlow.cpp
index 058d0b3..797656e 100644
--- a/src/OpticalFlow.cpp
+++ b/src/OpticalFlow.cpp
@@ -10,7 +10,7 @@
 using namespace std;
 
 #ifndef _MATLAB
-	bool OpticalFlow::IsDisplay=true;
+	bool OpticalFlow::IsDisplay=false;
 #else
 	bool OpticalFlow::IsDisplay=false;
 #endif