diff --git a/SU2_CFD/include/solvers/CHeatSolver.hpp b/SU2_CFD/include/solvers/CHeatSolver.hpp
index a286f9be7717..df2d99149b7f 100644
--- a/SU2_CFD/include/solvers/CHeatSolver.hpp
+++ b/SU2_CFD/include/solvers/CHeatSolver.hpp
@@ -196,6 +196,17 @@ class CHeatSolver final : public CScalarSolver<CHeatVariable> {
                         unsigned short iMesh,
                         unsigned short iRKStep) override;
 
+ /*!
+   * \brief Source term computation.
+   * \param[in] geometry - Geometrical definition of the problem.
+   * \param[in] solver_container - Container vector with all the solutions.
+   * \param[in] numerics_container - Description of the numerical method.
+   * \param[in] config - Definition of the particular problem.
+   * \param[in] iMesh - Index of the mesh in multigrid computations.
+   */
+  void Source_Residual(CGeometry *geometry, CSolver **solver_container,  CNumerics **numerics_container,
+                       CConfig *config, unsigned short iMesh) override ;
+
 
   void Set_Heatflux_Areas(CGeometry *geometry, CConfig *config) override;
 
diff --git a/SU2_CFD/src/solvers/CHeatSolver.cpp b/SU2_CFD/src/solvers/CHeatSolver.cpp
index 547697690027..479e81e42b41 100644
--- a/SU2_CFD/src/solvers/CHeatSolver.cpp
+++ b/SU2_CFD/src/solvers/CHeatSolver.cpp
@@ -311,6 +311,20 @@ void CHeatSolver::Viscous_Residual(CGeometry *geometry, CSolver **solver_contain
   }
 }
 
+void CHeatSolver::Source_Residual(CGeometry *geometry, CSolver **solver_container, CNumerics **numerics_container,
+                                  CConfig *config, unsigned short iMesh) {
+
+  /*--- Regular source terms go here. ---*/
+  /*--- ... ---*/
+
+ /*--- Custom user defined source term (from the python wrapper) ---*/
+  if (config->GetPyCustomSource()) {
+    CustomSourceResidual(geometry, solver_container, numerics_container, config, iMesh);
+  }
+
+}
+
+
 void CHeatSolver::Set_Heatflux_Areas(CGeometry *geometry, CConfig *config) {
 
   BEGIN_SU2_OMP_SAFE_GLOBAL_ACCESS {