Index: docs/model-api.txt
===================================================================
--- docs/model-api.txt	(revision 4220)
+++ docs/model-api.txt	(working copy)
@@ -875,6 +875,9 @@
                              relationship, allowing ``ManyToMany`` relationships to be
                              non-symmetrical.
 
+    ``db_table``             The name of the table to create for storing the m2m data.
+                             If this isn't given, Django will use ``app_label + '_' + table1 + '_' + table2``.
+
     =======================  ============================================================
 
 One-to-one relationships