diff --git a/pub/python/vol1/ft06_elasticity.py b/pub/python/vol1/ft06_elasticity.py
index ad4ec3cd..ac8f49bf 100644
--- a/pub/python/vol1/ft06_elasticity.py
+++ b/pub/python/vol1/ft06_elasticity.py
@@ -9,6 +9,7 @@
 
 from __future__ import print_function
 from fenics import *
+from ufl import nabla_div
 
 # Scaled variables
 L = 1; W = 0.2