diff --git a/slsDetectorCalibration/singlePhotonDetector.h b/slsDetectorCalibration/singlePhotonDetector.h
index 1582030d4..b3cfd2ab5 100644
--- a/slsDetectorCalibration/singlePhotonDetector.h
+++ b/slsDetectorCalibration/singlePhotonDetector.h
@@ -9,7 +9,7 @@
 #include "commonModeSubtraction.h"
 
 
-#define MYROOT1
+//#define MYROOT1
 
 #ifdef MYROOT1
 #include <TTree.h>