diff --git a/fenicsadapter/fenicsadapter.py b/fenicsadapter/fenicsadapter.py
index 99daba29..dba451f0 100644
--- a/fenicsadapter/fenicsadapter.py
+++ b/fenicsadapter/fenicsadapter.py
@@ -4,7 +4,7 @@
 :raise ImportError: if PRECICE_ROOT is not defined
 """
 import dolfin
-from dolfin import UserExpression, SubDomain, Function
+from dolfin import UserExpression, SubDomain, Function, FacetNormal, dot
 from scipy.interpolate import Rbf
 from scipy.interpolate import interp1d
 import numpy as np