diff --git a/Core/Fitting/FitObjective.cpp b/Core/Fitting/FitObjective.cpp
index 16b667afdf6316d33e92c177d8d51a0c9ab5bf92..96e911855e74de0ef90aeb2354abcbd7ded01e70 100644
--- a/Core/Fitting/FitObjective.cpp
+++ b/Core/Fitting/FitObjective.cpp
@@ -68,14 +68,14 @@ FitObjective::~FitObjective() = default;
 //! Constructs simulation/data pair for later fit.
 //! @param builder: simulation builder capable of producing simulations
 //! @param data: experimental data array
-//! @param uncertainties: data uncertainties array
+//! @param stdv: data uncertainties array
 //! @param weight: weight of dataset in metric calculations
 void FitObjective::addSimulationAndData(simulation_builder_t builder,
                                         const OutputData<double>& data,
-                                        std::unique_ptr<OutputData<double>> uncertainties,
+                                        std::unique_ptr<OutputData<double>>&& stdv,
                                         double weight)
 {
-    m_fit_objects.emplace_back(builder, data, std::move(uncertainties), weight);
+    m_fit_objects.emplace_back(builder, data, std::move(stdv), weight);
 }
 
 double FitObjective::evaluate(const mumufit::Parameters& params)
diff --git a/Core/Fitting/FitObjective.h b/Core/Fitting/FitObjective.h
index 143edb0b0248443206cc7ec74b2485cea3adf91f..c53e70ffd4b87916015885744b55f0b4817bbcc5 100644
--- a/Core/Fitting/FitObjective.h
+++ b/Core/Fitting/FitObjective.h
@@ -39,7 +39,7 @@ public:
 
 #ifndef SWIG
     void addSimulationAndData(simulation_builder_t builder, const OutputData<double>& data,
-                              std::unique_ptr<OutputData<double>> uncertainties,
+                              std::unique_ptr<OutputData<double>>&& stdv,
                               double weight = 1.0);
 #endif
     //! Constructs simulation/data pair for later fit.
diff --git a/auto/Wrap/doxygenCore.i b/auto/Wrap/doxygenCore.i
index bb50ed75718a80a7c1e65b21561629841c6c0c32..40beb55fa81c3a3b1a5e887561381b11fa3dd092 100644
--- a/auto/Wrap/doxygenCore.i
+++ b/auto/Wrap/doxygenCore.i
@@ -469,7 +469,7 @@ C++ includes: FitObjective.h
 %feature("docstring")  FitObjective::~FitObjective "FitObjective::~FitObjective()
 ";
 
-%feature("docstring")  FitObjective::addSimulationAndData "void FitObjective::addSimulationAndData(simulation_builder_t builder, const OutputData< double > &data, std::unique_ptr< OutputData< double >> uncertainties, double weight=1.0)
+%feature("docstring")  FitObjective::addSimulationAndData "void FitObjective::addSimulationAndData(simulation_builder_t builder, const OutputData< double > &data, std::unique_ptr< OutputData< double >> &&stdv, double weight=1.0)
 
 Constructs simulation/data pair for later fit.