diff --git a/src/ModelTree.cc b/src/ModelTree.cc
index 08d38348f1cbb134bb09fad4c2d2bc865ef915f9..a8348e7ac699a5004bae996560adfc227a13d711 100644
--- a/src/ModelTree.cc
+++ b/src/ModelTree.cc
@@ -1653,10 +1653,8 @@ ModelTree::writeJsonModelLocalVariables(ostream &output, deriv_node_temp_terms_t
         if (!efout.empty())
           output << ", ";
 
-        /* We append underscores to avoid name clashes with "g1" or "oo_" (see
-           also VariableNode::writeOutput) */
-        output << R"({"variable": ")" << symbol_table.getName(id) << R"(__")"
-               << R"(, "value": ")";
+        output << R"({"variable": ")" << symbol_table.getName(id)
+               << R"(", "value": ")";
         value->writeJsonOutput(output, tt, tef_terms);
         output << R"("})" << endl;
       }