diff --git a/src/rodsolver.hh b/src/rodsolver.hh
index df75c6bf1aee2483c0379177fd9f809ac63a9d29..006504b4be67aa2debdef97aba06249c1f79c691 100644
--- a/src/rodsolver.hh
+++ b/src/rodsolver.hh
@@ -29,7 +29,7 @@ class RodSolver
 public:
 
     RodSolver()
-        : hessianMatrix_(NULL)
+        : hessianMatrix_(NULL), h1SemiNorm_(NULL)
     {}
 
     void setup(const GridType& grid,