diff --git a/Calorimeter/CaloRec/CaloRec/ToolWithConstantsMixin.h b/Calorimeter/CaloRec/CaloRec/ToolWithConstantsMixin.h
index 96cac9061162c5771d289c33e5321350d464c34a..60c51cb6e6422f8efc180800299c42a01802544f 100644
--- a/Calorimeter/CaloRec/CaloRec/ToolWithConstantsMixin.h
+++ b/Calorimeter/CaloRec/CaloRec/ToolWithConstantsMixin.h
@@ -1,10 +1,9 @@
 // This file's extension implies that it's C, but it's really -*- C++ -*-.
 
 /*
-  Copyright (C) 2002-2017 CERN for the benefit of the ATLAS collaboration
+  Copyright (C) 2002-2020 CERN for the benefit of the ATLAS collaboration
 */
 
-// $Id: ToolWithConstantsMixin.h,v 1.10 2009-04-18 02:56:16 ssnyder Exp $
 /**
  * @file  ToolWithConstantsMixin.h
  * @author scott snyder <snyder@bnl.gov>
@@ -196,9 +195,9 @@ public:
    * be an instance of one of the @c Array<N> classes.
    */
   template <class T>
-  StatusCode declareConstant (const std::string& name,
-                              T& c,
-                              bool deflt = false);
+  void declareConstant (const std::string& name,
+                        T& c,
+                        bool deflt = false);
 
 
   /**
@@ -461,7 +460,7 @@ private:
    * @brief Add a new constant to our store.
    * @param pi The @c Propinfo instance describing this constant.
    */
-  StatusCode add_constant (Propinfo_Base* pi);
+  void add_constant (Propinfo_Base* pi);
 
 
   /**
diff --git a/Calorimeter/CaloRec/CaloRec/ToolWithConstantsMixin.icc b/Calorimeter/CaloRec/CaloRec/ToolWithConstantsMixin.icc
index 89ff976865d123415a87f8ca7a2bfc7e99409e1b..febb8cf4745359ceaeb403aa44bde56a045d75f7 100644
--- a/Calorimeter/CaloRec/CaloRec/ToolWithConstantsMixin.icc
+++ b/Calorimeter/CaloRec/CaloRec/ToolWithConstantsMixin.icc
@@ -1,10 +1,9 @@
 // This file's extension implies that it's C, but it's really -*- C++ -*-.
 
 /*
-  Copyright (C) 2002-2017 CERN for the benefit of the ATLAS collaboration
+  Copyright (C) 2002-2020 CERN for the benefit of the ATLAS collaboration
 */
 
-// $Id: ToolWithConstantsMixin.icc,v 1.6 2009-04-18 02:56:16 ssnyder Exp $
 /**
  * @file  ToolWithConstantsMixin.icc
  * @author scott snyder <snyder@bnl.gov>
@@ -76,14 +75,13 @@ StatusCode do_declare (ToolWithConstantsMixin* self,
  * be an instance of one of the @c Array<N> classes.
  */
 template <class T>
-StatusCode
+void
 ToolWithConstantsMixin::declareConstant (const std::string& name,
                                          T& c,
                                          bool deflt /*= false*/)
 {
   c = T();
-  CHECK( add_constant (makeinfo (name, c, deflt)) );
-  return StatusCode (StatusCode::SUCCESS, true);
+  add_constant (makeinfo (name, c, deflt));
 }
 
 
diff --git a/Calorimeter/CaloRec/src/ToolWithConstantsMixin.cxx b/Calorimeter/CaloRec/src/ToolWithConstantsMixin.cxx
index 17e9fae866938a25ff165c2002677269538ec983..c51928e24c04f953b90ef4f3f43a63c693c9e4c9 100755
--- a/Calorimeter/CaloRec/src/ToolWithConstantsMixin.cxx
+++ b/Calorimeter/CaloRec/src/ToolWithConstantsMixin.cxx
@@ -1,10 +1,9 @@
 // This file's extension implies that it's C, but it's really -*- C++ -*-.
 
 /*
-  Copyright (C) 2002-2017 CERN for the benefit of the ATLAS collaboration
+  Copyright (C) 2002-2020 CERN for the benefit of the ATLAS collaboration
 */
 
-// $Id: ToolWithConstantsMixin.cxx,v 1.12 2009-04-18 02:56:18 ssnyder Exp $
 /**
  * @file  ToolWithConstantsMixin.cxx
  * @author scott snyder <snyder@bnl.gov>
@@ -386,10 +385,10 @@ ToolWithConstantsMixin::setProperty (const Property& p)
  * @brief Add a new constant to our store.
  * @param pi The @c Propinfo instance describing this constant.
  */
-StatusCode ToolWithConstantsMixin::add_constant (Propinfo_Base* pi)
+void ToolWithConstantsMixin::add_constant (Propinfo_Base* pi)
 {
   if (!pi)
-    return StatusCode::FAILURE;
+    return;
 
   // Make sure that a name isn't duplicated.
   for (unsigned int i=0; i < m_infos.size(); i++)
@@ -397,14 +396,13 @@ StatusCode ToolWithConstantsMixin::add_constant (Propinfo_Base* pi)
       REPORT_ERROR(StatusCode::FAILURE)
         << "Duplicate constant: " << pi->m_name;
       delete pi;
-      return StatusCode::FAILURE;
+      return;
     }
 
   // Record this declaration in @c m_infos.
   // @c makeinfo is one of an overloaded family of functions that
   // creates the @c Propinfo_* structure for the type of @a c.
   m_infos.push_back (pi);
-  return StatusCode::SUCCESS;
 }