diff --git a/lib/galaxy/model/mapping.py b/lib/galaxy/model/mapping.py
index f58e70a2703..68f28b53ed5 100644
--- a/lib/galaxy/model/mapping.py
+++ b/lib/galaxy/model/mapping.py
@@ -1163,7 +1163,7 @@ model.HistoryDatasetAssociationTagAssociation.table = Table(
     Column( "id", Integer, primary_key=True ),
     Column( "history_dataset_association_id", Integer, ForeignKey( "history_dataset_association.id" ), index=True ),
     Column( "tag_id", Integer, ForeignKey( "tag.id" ), index=True ),
-    Column( "user_id", Integer, ForeignKey( "galaxy_user .id" ), index=True ),
+    Column( "user_id", Integer, ForeignKey( "galaxy_user.id" ), index=True ),
     Column( "user_tname", TrimmedString(255), index=True ),
     Column( "value", TrimmedString(255), index=True ),
     Column( "user_value", TrimmedString(255), index=True ) )