diff --git a/preprocessor/SteadyStateModel.cc b/preprocessor/SteadyStateModel.cc
index d2a1f856de79db172466432f59c8c0cd324316b0..4533c41f27a2e232d2a8c77c6cd0a1d703a222db 100644
--- a/preprocessor/SteadyStateModel.cc
+++ b/preprocessor/SteadyStateModel.cc
@@ -22,8 +22,8 @@
 
 #include "SteadyStateModel.hh"
 
-SteadyStateModel::SteadyStateModel(SymbolTable &symbol_table_arg, NumericalConstants &num_constants, ExternalFunctionsTable &external_functions_table_arg, const StaticModel &static_model_arg) :
-  DataTree(symbol_table_arg, num_constants, external_functions_table_arg), static_model(static_model_arg)
+SteadyStateModel::SteadyStateModel(SymbolTable &symbol_table_arg, NumericalConstants &num_constants_arg, ExternalFunctionsTable &external_functions_table_arg, const StaticModel &static_model_arg) :
+  DataTree(symbol_table_arg, num_constants_arg, external_functions_table_arg), static_model(static_model_arg)
 {
 }
 
diff --git a/preprocessor/SteadyStateModel.hh b/preprocessor/SteadyStateModel.hh
index f79b358f5c6bebd9c5c29259df6ff87eafd22bfe..a7e0a5424fb7b01bbd9b15cc71e1abe676f91d07 100644
--- a/preprocessor/SteadyStateModel.hh
+++ b/preprocessor/SteadyStateModel.hh
@@ -34,7 +34,7 @@ private:
   const StaticModel &static_model;
 
 public:
-  SteadyStateModel(SymbolTable &symbol_table_arg, NumericalConstants &num_constants, ExternalFunctionsTable &external_functions_table_arg, const StaticModel &static_model_arg);
+  SteadyStateModel(SymbolTable &symbol_table_arg, NumericalConstants &num_constants_arg, ExternalFunctionsTable &external_functions_table_arg, const StaticModel &static_model_arg);
   //! Add an expression of the form "var = expr;"
   void addDefinition(int symb_id, expr_t expr);
   //! Add an expression of the form "[ var1, var2, ... ] = expr;"