diff --git a/lib/galaxy/model/tags.py b/lib/galaxy/model/tags.py
index 14e73d67784..3b72f31a223 100644
--- a/lib/galaxy/model/tags.py
+++ b/lib/galaxy/model/tags.py
@@ -30,7 +30,7 @@ class TagHandler(object):
     def __init__(self, sa_session):
         self.sa_session = sa_session
         # Minimum tag length.
-        self.min_tag_len = 2
+        self.min_tag_len = 1
         # Maximum tag length.
         self.max_tag_len = 255
         # Tag separator.