diff --git a/doc/salome/examples/shape_proximity.py b/doc/salome/examples/shape_proximity.py
index 997730e93..4e634fdc1 100644
--- a/doc/salome/examples/shape_proximity.py
+++ b/doc/salome/examples/shape_proximity.py
@@ -1,5 +1,6 @@
 # Shape Proximity
 
+import math
 import salome
 salome.salome_init_without_session()
 import GEOM