diff --git a/select_url_field/fields.py b/select_url_field/fields.py
index 9dc0088..971b118 100644
--- a/select_url_field/fields.py
+++ b/select_url_field/fields.py
@@ -91,7 +91,9 @@ def __init__(self, max_length=None, min_length=None, *args, **kwargs):
         super(SelectURLFormField, self).__init__(max_length, min_length, *args, **kwargs)
         self.validators.append(SelectURLValidator())
 
-
-from south.modelsinspector import add_introspection_rules
-add_introspection_rules([], ["^select_url_field\.fields\.IxxyURLField"])
-add_introspection_rules([], ["^select_url_field\.fields\.SelectURLField"])
\ No newline at end of file
+try:
+    from south.modelsinspector import add_introspection_rules
+    add_introspection_rules([], ["^select_url_field\.fields\.IxxyURLField"])
+    add_introspection_rules([], ["^select_url_field\.fields\.SelectURLField"])
+except ImportError:
+    pass
\ No newline at end of file