diff --git a/dune/solvers/iterationsteps/multigridstep.cc b/dune/solvers/iterationsteps/multigridstep.cc
index d2a11bb9f866d5953cb3d0356ecb27b3dcd7dfd8..ee1bb5c85fd334edeb8fa214c77a46d4fd20e6d9 100644
--- a/dune/solvers/iterationsteps/multigridstep.cc
+++ b/dune/solvers/iterationsteps/multigridstep.cc
@@ -196,7 +196,7 @@ void MultigridStep<MatrixType, VectorType, BitVectorType>::iterate()
     VectorType fineResidual = rhs[level];
     mat[level]->mmv(x[level], fineResidual);
 
-    // restrict residuum
+    // restrict residual
     this->mgTransfer_[level-1]->restrict(fineResidual, rhs[level-1]);