diff --git a/astroquery/besancon/core.py b/astroquery/besancon/core.py
index 15f6cfc0bd..0f823eec98 100644
--- a/astroquery/besancon/core.py
+++ b/astroquery/besancon/core.py
@@ -37,6 +37,7 @@
     'db': 0,
     'adif': 0.700,
     'ev':[""] * 25,
+    'AV':[""] * 25,
     'di':[""] * 25,
     'oo':[-7] + [-99] * 12,
     'ff':[15] + [99] * 12,