diff --git a/MathLib/LinAlg/SystemOfLinearEquations/LisLinearSystem.cpp b/MathLib/LinAlg/SystemOfLinearEquations/LisLinearSystem.cpp
index 671e2ec13203ff41f47eb77834f5cdac5bc8d6df..9aa725534222677c4a973a759b62e95bd8b6016d 100644
--- a/MathLib/LinAlg/SystemOfLinearEquations/LisLinearSystem.cpp
+++ b/MathLib/LinAlg/SystemOfLinearEquations/LisLinearSystem.cpp
@@ -31,7 +31,7 @@ bool LisLinearSystem::checkError(int err)
     return ok;
 }
 
-LisLinearSystem::LisLinearSystem(std::size_t dimension, RowMajorSparsity* /*sp*/)
+LisLinearSystem::LisLinearSystem(std::size_t dimension, RowMajorSparsity*)
 : _dim(dimension), _max_diag_coeff(.0)
 {
     int ierr = 0;