diff --git a/include/aidge/operator/Operator.hpp b/include/aidge/operator/Operator.hpp
index adec17d07f39727a0c75d32fa24bcc624aa66e1a..f1e25b7a1f0ba3c07d656d4170a4b2d2bc045e5b 100644
--- a/include/aidge/operator/Operator.hpp
+++ b/include/aidge/operator/Operator.hpp
@@ -109,7 +109,7 @@ public:
      * The pointer itself is not changed, thus keeping the current connections.
      * @param inputIdx Index of the input to set.
      */
-    virtual void setOutput(const IOIndex_t outputIdx, const std::shared_ptr<Data>& data) = 0;
+    virtual void setOutput(const IOIndex_t outputIdx, const std::shared_ptr<Data>& data) const = 0;
     virtual std::shared_ptr<Data> getRawOutput(const IOIndex_t outputIdx) const = 0;
 
     std::shared_ptr<Hook> getHook(const std::string& hookName) {
diff --git a/include/aidge/operator/OperatorTensor.hpp b/include/aidge/operator/OperatorTensor.hpp
index 657a6d8ab6124b8919a3ac8fea5b6bfa6c4254b9..1097454fce62f645eb83c491498031738847e96c 100644
--- a/include/aidge/operator/OperatorTensor.hpp
+++ b/include/aidge/operator/OperatorTensor.hpp
@@ -62,7 +62,7 @@ public:
     std::shared_ptr<Data> getRawInput(const IOIndex_t inputIdx) const override final;
 
     // output management
-    void setOutput(const IOIndex_t outputIdx, const std::shared_ptr<Data>& data) override;
+    void setOutput(const IOIndex_t outputIdx, const std::shared_ptr<Data>& data) const override;
     virtual const std::shared_ptr<Tensor>& getOutput(const IOIndex_t outputIdx) const;
     std::shared_ptr<Aidge::Data> getRawOutput(const Aidge::IOIndex_t outputIdx) const override final;
     ///////////////////////////////////////////////////
diff --git a/include/aidge/operator/Producer.hpp b/include/aidge/operator/Producer.hpp
index 9e3bdd1ba2f601da27dea3a6a01131a0c8191eb4..6b37fbd13b6e29f4b11a9e1628da9dbd7b35bb35 100644
--- a/include/aidge/operator/Producer.hpp
+++ b/include/aidge/operator/Producer.hpp
@@ -115,7 +115,7 @@ public:
         // fmt::print("Basic Producer backward() function.\n");
     }
 
-    void setOutput(const Aidge::IOIndex_t outputIdx, const std::shared_ptr<Aidge::Data>& data) override {
+    void setOutput(const Aidge::IOIndex_t outputIdx, const std::shared_ptr<Aidge::Data>& data) const override {
         if (mAttributes->template getAttr<ProdAttr::Constant>()) {
             AIDGE_THROW_OR_ABORT(std::runtime_error, "Producer is constant, cannot update output.");
         }
diff --git a/src/operator/OperatorTensor.cpp b/src/operator/OperatorTensor.cpp
index 938a386c4ca743e33f97caa981ff160522299948..ff6fb9ce4b6b8596477dfdd1f43f8927e534459b 100644
--- a/src/operator/OperatorTensor.cpp
+++ b/src/operator/OperatorTensor.cpp
@@ -73,7 +73,7 @@ const std::shared_ptr<Aidge::Tensor>& Aidge::OperatorTensor::getInput(const Aidg
     return mInputs[inputIdx];
 }
 
-void Aidge::OperatorTensor::setOutput(const Aidge::IOIndex_t outputIdx, const std::shared_ptr<Aidge::Data>& data) {
+void Aidge::OperatorTensor::setOutput(const Aidge::IOIndex_t outputIdx, const std::shared_ptr<Aidge::Data>& data) const {
     AIDGE_ASSERT(data->type() == Tensor::Type, "{} Operator only accepts Tensors as inputs", type());
     AIDGE_ASSERT(outputIdx < nbOutputs(), "{} Operator has {} outputs", type(), nbOutputs());
     const auto& data_tensor = std::dynamic_pointer_cast<Tensor>(data);