diff --git a/doc/extra-intersphinx.txt b/doc/extra-intersphinx.txt
new file mode 100644
index 0000000000000000000000000000000000000000..75d6609738c5cd11957de705cf232b5b2edea3dd
--- /dev/null
+++ b/doc/extra-intersphinx.txt
@@ -0,0 +1 @@
+bob.db.base