diff --git a/src/transmissionReconstruction/reconstruction/solvingEquationSystem/solve.cpp b/src/transmissionReconstruction/reconstruction/solvingEquationSystem/solve.cpp
index 89641ab..2d691b0 100644
--- a/src/transmissionReconstruction/reconstruction/solvingEquationSystem/solve.cpp
+++ b/src/transmissionReconstruction/reconstruction/solvingEquationSystem/solve.cpp
@@ -48,7 +48,7 @@ namespace Recon
         }
     }
 
-    std::vector<std::vector<Aurora::Matrix>> solveParameterIterator(Aurora::Sparse M, const Aurora::Matrix &b,
+    std::vector<std::vector<Aurora::Matrix>> solveParameterIterator(Aurora::Sparse M, Aurora::Matrix &b,
                                const Aurora::Matrix &dims, bool oneIter, bool nonNeg)
     {
         if (Recon::transParams::name == "TVAL3"){