diff --git a/src/storm/models/sparse/Ctmc.cpp b/src/storm/models/sparse/Ctmc.cpp
index 884eb359d..a43aded44 100644
--- a/src/storm/models/sparse/Ctmc.cpp
+++ b/src/storm/models/sparse/Ctmc.cpp
@@ -35,7 +35,12 @@ namespace storm {
             std::vector<ValueType> const& Ctmc<ValueType, RewardModelType>::getExitRateVector() const {
                 return exitRates;
             }
-            
+
+            template <typename ValueType, typename RewardModelType>
+            std::vector<ValueType>& Ctmc<ValueType, RewardModelType>::getExitRateVector() {
+                return exitRates;
+            }
+
             template <typename ValueType, typename RewardModelType>
             std::vector<ValueType> Ctmc<ValueType, RewardModelType>::createExitRateVector(storm::storage::SparseMatrix<ValueType> const& rateMatrix) {
                 std::vector<ValueType> exitRates(rateMatrix.getRowCount());
diff --git a/src/storm/models/sparse/Ctmc.h b/src/storm/models/sparse/Ctmc.h
index 417a899a4..8bb1f37ed 100644
--- a/src/storm/models/sparse/Ctmc.h
+++ b/src/storm/models/sparse/Ctmc.h
@@ -65,7 +65,14 @@ namespace storm {
                  * @return The exit rate vector.
                  */
                 std::vector<ValueType> const& getExitRateVector() const;
-                
+
+                /*!
+                 * Retrieves the vector of exit rates of the model.
+                 *
+                 * @return The exit rate vector.
+                 */
+                std::vector<ValueType>& getExitRateVector();
+
             private:
                 /*!
                  * Computes the exit rate vector based on the given rate matrix.
diff --git a/src/storm/utility/ModelInstantiator.h b/src/storm/utility/ModelInstantiator.h
index 17de0ea21..ce5154a2b 100644
--- a/src/storm/utility/ModelInstantiator.h
+++ b/src/storm/utility/ModelInstantiator.h
@@ -67,15 +67,28 @@ namespace storm {
                 template<typename PMT = ParametricSparseModelType>
                 typename std::enable_if<
                             std::is_same<PMT,storm::models::sparse::Dtmc<typename ParametricSparseModelType::ValueType>>::value ||
-                            std::is_same<PMT,storm::models::sparse::Mdp<typename ParametricSparseModelType::ValueType>>::value ||
-                            std::is_same<PMT,storm::models::sparse::Ctmc<typename ParametricSparseModelType::ValueType>>::value
+                            std::is_same<PMT,storm::models::sparse::Mdp<typename ParametricSparseModelType::ValueType>>::value
                 >::type
                 initializeModelSpecificData(PMT const& parametricModel) {
                     auto stateLabelingCopy = parametricModel.getStateLabeling();
                     auto choiceLabelingCopy = parametricModel.getOptionalChoiceLabeling();
                     this->instantiatedModel = std::make_shared<ConstantSparseModelType>(buildDummyMatrix(parametricModel.getTransitionMatrix()), std::move(stateLabelingCopy), buildDummyRewardModels(parametricModel.getRewardModels()), std::move(choiceLabelingCopy));
                 }
-                
+
+                template<typename PMT = ParametricSparseModelType>
+                typename std::enable_if<
+                std::is_same<PMT,storm::models::sparse::Ctmc<typename ParametricSparseModelType::ValueType>>::value
+                >::type
+                initializeModelSpecificData(PMT const& parametricModel) {
+                    auto stateLabelingCopy = parametricModel.getStateLabeling();
+                    auto choiceLabelingCopy = parametricModel.getOptionalChoiceLabeling();
+                    std::vector<ConstantType> exitRates(parametricModel.getExitRateVector().size(), storm::utility::one<ConstantType>());
+                    this->instantiatedModel = std::make_shared<ConstantSparseModelType>(buildDummyMatrix(parametricModel.getTransitionMatrix()), std::move(exitRates), std::move(stateLabelingCopy), buildDummyRewardModels(parametricModel.getRewardModels()), std::move(choiceLabelingCopy));
+
+                    initializeVectorMapping(this->instantiatedModel->getExitRateVector(), this->functions, this->vectorMapping, parametricModel.getExitRateVector());
+                }
+
+
                 template<typename PMT = ParametricSparseModelType>
                 typename std::enable_if<
                             std::is_same<PMT,storm::models::sparse::MarkovAutomaton<typename ParametricSparseModelType::ValueType>>::value