diff --git a/opm/core/linalg/LinearSolverPetsc.cpp b/opm/core/linalg/LinearSolverPetsc.cpp
index 202db19b1..daaa71447 100644
--- a/opm/core/linalg/LinearSolverPetsc.cpp
+++ b/opm/core/linalg/LinearSolverPetsc.cpp
@@ -142,6 +142,7 @@ namespace{
             VecDestroy( &b );
             MatDestroy( &A );
             KSPDestroy( &ksp );
+            PCDestroy( &preconditioner );
         }
     };