diff --git a/CALIBRATION/shms_cal_calib/THcPShowerCalib.h b/CALIBRATION/shms_cal_calib/THcPShowerCalib.h
index 9ec2c150881223875ed5391753dfe40d71bec165..6078a098423ba01f249249756293390fad38dfbb 100644
--- a/CALIBRATION/shms_cal_calib/THcPShowerCalib.h
+++ b/CALIBRATION/shms_cal_calib/THcPShowerCalib.h
@@ -29,8 +29,10 @@
 #define DELTA_MIN -10   //SHMS nominal acceptance
 #define DELTA_MAX  22
 
-#define PR_ADC_THR 250
-#define SH_ADC_THR 250
+//#define PR_ADC_THR 250
+//#define SH_ADC_THR 250
+#define PR_ADC_THR 0
+#define SH_ADC_THR 0
 
 //#define MAX_TRACKS 10