diff --git a/src/ComputingTasks.cc b/src/ComputingTasks.cc
index 7277a0c442b3f376988c308665e6e80e94c1aec6..4f61891c1f7d4d3a427201bcf2af5a5fc2342a43 100644
--- a/src/ComputingTasks.cc
+++ b/src/ComputingTasks.cc
@@ -5019,7 +5019,7 @@ VarExpectationModelStatement::writeOutput(ostream &output, const string &basenam
     }
   output << mstruct << ".param_indices = [ ";
   for (int param_id : aux_params_ids)
-    output << symbol_table.getTypeSpecificID(param_id) << ' ';
+    output << symbol_table.getTypeSpecificID(param_id)+1 << ' ';
   output << "];" << endl;
 }