diff --git a/NPLib/CsI/TCsIData.cxx b/NPLib/CsI/TCsIData.cxx
index aeca7b3d1a8f0f45790f914bed21333b4e1298db..27dcef3aa843523d0485c913c7556e09b07a8f84 100644
--- a/NPLib/CsI/TCsIData.cxx
+++ b/NPLib/CsI/TCsIData.cxx
@@ -44,6 +44,14 @@ void TCsIData::Clear()
    // Time
    fCsI_T_Number.clear();
    fCsI_T_Time.clear();
+
+   // PhotoDiode 
+   fPhotoDiode_E_Energy.clear();
+   fPhotoDiode_E_Number.clear();
+   fPhotoDiode_T_Time.clear();
+   fPhotoDiode_T_Number.clear();
+ 
+
 }