diff --git a/gramps/gen/db/read.py b/gramps/gen/db/read.py
index ea0ed0d98..67e6ec02c 100644
--- a/gramps/gen/db/read.py
+++ b/gramps/gen/db/read.py
@@ -400,6 +400,7 @@ class DbBsddbRead(DbReadBase, Callback):
         self.citation_map = {}
         self.repository_map  = {}
         self.note_map = {}
+        self.tag_map = {}
         self.media_map  = {}
         self.event_map  = {}
         self.metadata   = {}