diff --git a/src/ComputingTasks.cc b/src/ComputingTasks.cc
index 1b19d9224abf64d89f9ee442efe3efd1f0058f44..c5f7634b4a04b9791a581780157f877bf07f5368 100644
--- a/src/ComputingTasks.cc
+++ b/src/ComputingTasks.cc
@@ -1469,7 +1469,7 @@ EstimatedParamsStatement::writeJsonOutput(ostream &output) const
           break;
         }
 
-      output << ", \"init_val\": \"";
+      output << ", \"initval\": \"";
       it->init_val->writeJsonOutput(output, {}, {});
       output << "\", \"lower_bound\": \"";
       it->low_bound->writeJsonOutput(output, {}, {});
diff --git a/src/NumericalInitialization.cc b/src/NumericalInitialization.cc
index a781388da530aecf0ff0fd90729c6b5487ba0c8d..3d4d24a1801757d2b97e96d252cf5449d878fef5 100644
--- a/src/NumericalInitialization.cc
+++ b/src/NumericalInitialization.cc
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2003-2017 Dynare Team
+ * Copyright (C) 2003-2019 Dynare Team
  *
  * This file is part of Dynare.
  *
@@ -298,7 +298,7 @@ EndValStatement::writeOutput(ostream &output, const string &basename, bool minim
 void
 EndValStatement::writeJsonOutput(ostream &output) const
 {
-  output << "{\"statementName\": \"end_val\", \"vals\": [";
+  output << "{\"statementName\": \"endval\", \"vals\": [";
   writeJsonInitValues(output);
   output << "]}";
 }
@@ -394,7 +394,7 @@ HistValStatement::writeOutput(ostream &output, const string &basename, bool mini
 void
 HistValStatement::writeJsonOutput(ostream &output) const
 {
-  output << "{\"statementName\": \"hist_val\", \"vals\": [";
+  output << "{\"statementName\": \"histval\", \"vals\": [";
   for (auto it = hist_values.begin();
        it != hist_values.end(); it++)
     {