diff --git a/EventFilter/CSCRawToDigi/interface/CSCTMBHeader2006.h b/EventFilter/CSCRawToDigi/interface/CSCTMBHeader2006.h
index 34556549c4b7e..426b8c8ff2f71 100644
--- a/EventFilter/CSCRawToDigi/interface/CSCTMBHeader2006.h
+++ b/EventFilter/CSCRawToDigi/interface/CSCTMBHeader2006.h
@@ -47,6 +47,7 @@ struct CSCTMBHeader2006 : public CSCVTMBHeaderFormat {
   void addALCT1(const CSCALCTDigi& digi) override;
   void addCorrelatedLCT0(const CSCCorrelatedLCTDigi& digi) override;
   void addCorrelatedLCT1(const CSCCorrelatedLCTDigi& digi) override;
+  void addShower(const CSCShowerDigi& digi) override {}
 
   void swapCLCTs(CSCCLCTDigi& digi1, CSCCLCTDigi& digi2);
 
diff --git a/EventFilter/CSCRawToDigi/interface/CSCTMBHeader2007.h b/EventFilter/CSCRawToDigi/interface/CSCTMBHeader2007.h
index ca4e610462ed0..6bee14ad6d30f 100644
--- a/EventFilter/CSCRawToDigi/interface/CSCTMBHeader2007.h
+++ b/EventFilter/CSCRawToDigi/interface/CSCTMBHeader2007.h
@@ -50,6 +50,7 @@ struct CSCTMBHeader2007 : public CSCVTMBHeaderFormat {
   void addALCT1(const CSCALCTDigi& digi) override;
   void addCorrelatedLCT0(const CSCCorrelatedLCTDigi& digi) override;
   void addCorrelatedLCT1(const CSCCorrelatedLCTDigi& digi) override;
+  void addShower(const CSCShowerDigi& digi) override {}
 
   void swapCLCTs(CSCCLCTDigi& digi1, CSCCLCTDigi& digi2);
 
diff --git a/EventFilter/CSCRawToDigi/interface/CSCTMBHeader2007_rev0x50c3.h b/EventFilter/CSCRawToDigi/interface/CSCTMBHeader2007_rev0x50c3.h
index 12365f5c8062f..84ec227300947 100644
--- a/EventFilter/CSCRawToDigi/interface/CSCTMBHeader2007_rev0x50c3.h
+++ b/EventFilter/CSCRawToDigi/interface/CSCTMBHeader2007_rev0x50c3.h
@@ -50,6 +50,7 @@ struct CSCTMBHeader2007_rev0x50c3 : public CSCVTMBHeaderFormat {
   void addALCT1(const CSCALCTDigi& digi) override;
   void addCorrelatedLCT0(const CSCCorrelatedLCTDigi& digi) override;
   void addCorrelatedLCT1(const CSCCorrelatedLCTDigi& digi) override;
+  void addShower(const CSCShowerDigi& digi) override {}
 
   void swapCLCTs(CSCCLCTDigi& digi1, CSCCLCTDigi& digi2);
 
diff --git a/EventFilter/CSCRawToDigi/interface/CSCTMBHeader2013.h b/EventFilter/CSCRawToDigi/interface/CSCTMBHeader2013.h
index a48cb58bd8724..c58cd36a5ec5d 100644
--- a/EventFilter/CSCRawToDigi/interface/CSCTMBHeader2013.h
+++ b/EventFilter/CSCRawToDigi/interface/CSCTMBHeader2013.h
@@ -50,6 +50,7 @@ struct CSCTMBHeader2013 : public CSCVTMBHeaderFormat {
   void addALCT1(const CSCALCTDigi& digi) override;
   void addCorrelatedLCT0(const CSCCorrelatedLCTDigi& digi) override;
   void addCorrelatedLCT1(const CSCCorrelatedLCTDigi& digi) override;
+  void addShower(const CSCShowerDigi& digi) override {}
 
   void swapCLCTs(CSCCLCTDigi& digi1, CSCCLCTDigi& digi2);
 
diff --git a/EventFilter/CSCRawToDigi/interface/CSCVTMBHeaderFormat.h b/EventFilter/CSCRawToDigi/interface/CSCVTMBHeaderFormat.h
index ee13cece1ce16..2f32bc8dbe0c9 100644
--- a/EventFilter/CSCRawToDigi/interface/CSCVTMBHeaderFormat.h
+++ b/EventFilter/CSCRawToDigi/interface/CSCVTMBHeaderFormat.h
@@ -57,7 +57,7 @@ class CSCVTMBHeaderFormat {
   virtual void addALCT1(const CSCALCTDigi& digi) = 0;
   virtual void addCorrelatedLCT0(const CSCCorrelatedLCTDigi& digi) = 0;
   virtual void addCorrelatedLCT1(const CSCCorrelatedLCTDigi& digi) = 0;
-  void addShower(const CSCShowerDigi& digi) {}
+  virtual void addShower(const CSCShowerDigi& digi) = 0;
 
   virtual void print(std::ostream& os) const = 0;