diff --git a/dumux/implicit/cellcentered/localjacobian.hh b/dumux/implicit/cellcentered/localjacobian.hh
index 56828a566f77698e08daef5d0f959022849ba39c..da7b6dd878e9fa39bd87415be4c49cdcf76a8595 100644
--- a/dumux/implicit/cellcentered/localjacobian.hh
+++ b/dumux/implicit/cellcentered/localjacobian.hh
@@ -239,8 +239,8 @@ protected:
 
         // save a copy of the original privars and vol vars in order
         // to restore the original solution after deflection
-        auto origPriVars = curSol[globalI_];
-        auto origVolVars = curVolVars;
+        const auto origPriVars = curSol[globalI_];
+        const auto origVolVars = curVolVars;
 
         // derivatives in the neighbors with repect to the current elements
         Dune::BlockVector<PrimaryVariables> neighborDeriv(numNeighbors);