diff --git a/gramps2/src/plugins/Ancestors.py b/gramps2/src/plugins/Ancestors.py
index 24229d6cb..1cb38f376 100644
--- a/gramps2/src/plugins/Ancestors.py
+++ b/gramps2/src/plugins/Ancestors.py
@@ -104,6 +104,7 @@ class ComprehensiveAncestorsReport (Report.Report):
         if output:
             self.standalone = 1
             self.doc.open(output)
+            self.doc.init()
         else:
             self.standalone = 0