diff --git a/src/QMCDrivers/DMC/DMCBatched.cpp b/src/QMCDrivers/DMC/DMCBatched.cpp
index 5e265bb1c2..58b2e4c08c 100644
--- a/src/QMCDrivers/DMC/DMCBatched.cpp
+++ b/src/QMCDrivers/DMC/DMCBatched.cpp
@@ -396,7 +396,7 @@ void DMCBatched::process(xmlNodePtr node)
     app_log() << "  Creating the branching engine and walker controler" << std::endl;
     const auto refE_update_scheme = dmcdriver_input_.get_refenergy_update_scheme();
     app_log() << "    Reference energy is updated using the "
-              << (refE_update_scheme == DMCRefEnergyScheme::LEGACY ? "legacy" : "history limited") << " scheme"
+              << (refE_update_scheme == DMCRefEnergyScheme::UNLIMITED_HISTORY ? "unlimited_history" : "limited_history") << " scheme"
               << std::endl;
     branch_engine_ =
         std::make_unique<SFNBranch>(qmcdriver_input_.get_tau(), dmcdriver_input_.get_feedback(), refE_update_scheme);
diff --git a/src/QMCDrivers/DMC/DMCDriverInput.cpp b/src/QMCDrivers/DMC/DMCDriverInput.cpp
index b4cab5512f..d954069722 100644
--- a/src/QMCDrivers/DMC/DMCDriverInput.cpp
+++ b/src/QMCDrivers/DMC/DMCDriverInput.cpp
@@ -25,7 +25,7 @@ void DMCDriverInput::readXML(xmlNodePtr node)
   parameter_set_.add(NonLocalMove, "nonlocalmoves", {"no", "yes", "v0", "v1", "v3"});
   parameter_set_.add(max_age_, "MaxAge");
   parameter_set_.add(feedback_, "feedback");
-  parameter_set_.add(refE_update_scheme_str, "refenergy_update_scheme", {"legacy", "limited_history"});
+  parameter_set_.add(refE_update_scheme_str, "refenergy_update_scheme", {"unlimited_history", "limited_history"});
 
   // from DMC.cpp put(xmlNodePtr)
   parameter_set_.add(branch_interval_, "branchInterval");
@@ -68,8 +68,8 @@ void DMCDriverInput::readXML(xmlNodePtr node)
   if (reserve_ < 1.0)
     throw std::runtime_error("You can only reserve walkers above the target walker count");
 
-  if (refE_update_scheme_str == "legacy")
-    refenergy_update_scheme_ = DMCRefEnergyScheme::LEGACY;
+  if (refE_update_scheme_str == "unlimited_history")
+    refenergy_update_scheme_ = DMCRefEnergyScheme::UNLIMITED_HISTORY;
   else
     refenergy_update_scheme_ = DMCRefEnergyScheme::LIMITED_HISTORY;
 }
diff --git a/src/QMCDrivers/DMC/DMCRefEnergyScheme.h b/src/QMCDrivers/DMC/DMCRefEnergyScheme.h
index efef598fa8..caa4d8f339 100644
--- a/src/QMCDrivers/DMC/DMCRefEnergyScheme.h
+++ b/src/QMCDrivers/DMC/DMCRefEnergyScheme.h
@@ -18,7 +18,7 @@ namespace qmcplusplus
  */
 enum class DMCRefEnergyScheme
 {
-  LEGACY,
+  UNLIMITED_HISTORY,
   LIMITED_HISTORY
 };
 } // namespace qmcplusplus