diff --git a/src/Numerics/LinearAlgebra/Double/DenseMatrix.cs b/src/Numerics/LinearAlgebra/Double/DenseMatrix.cs
index 697f9b6a..14f091e2 100644
--- a/src/Numerics/LinearAlgebra/Double/DenseMatrix.cs
+++ b/src/Numerics/LinearAlgebra/Double/DenseMatrix.cs
@@ -206,7 +206,7 @@ namespace MathNet.Numerics.LinearAlgebra.Double
             }
             else
             {
-                Add(other);
+                Add(m);
             }
         }