diff --git a/docs/format-changelog.rst b/docs/format-changelog.rst
index c44fb3fb..cf7110fc 100644
--- a/docs/format-changelog.rst
+++ b/docs/format-changelog.rst
@@ -153,4 +153,13 @@ Added
 ~~~~~
 
 - The key ``tag`` is introduced as a complement to ``commit`` and ``branch``
-  in ``repos`` and ``default``.
+  in ``repos``.
+
+Version 16
+----------
+
+Fixed
+~~~~~
+
+- The key ``tag`` introduced in v15 was not supported in ``defaults``.
+  It's now added.
diff --git a/docs/userguide.rst b/docs/userguide.rst
index a914e68a..28c5cee6 100644
--- a/docs/userguide.rst
+++ b/docs/userguide.rst
@@ -371,6 +371,10 @@ Configuration reference
       Sets the default ``branch`` property applied to all repositories that
       do not override this.
 
+    ``tag``: string [optional]
+      Sets the default ``tag`` property applied to all repositories that
+      do not override this.
+
     ``patches``: dict [optional]
       This key can contain default values for some repository patch
       properties. If a default value is set for a patch property it may
diff --git a/kas/__version__.py b/kas/__version__.py
index df33277a..88489660 100644
--- a/kas/__version__.py
+++ b/kas/__version__.py
@@ -28,5 +28,5 @@
 __version__ = '4.1'
 
 # Please update docs/format-changelog.rst when changing the file version.
-__file_version__ = 15
+__file_version__ = 16
 __compatible_file_version__ = 1
diff --git a/kas/repos.py b/kas/repos.py
index 8a459921..6c4d5a4f 100644
--- a/kas/repos.py
+++ b/kas/repos.py
@@ -179,7 +179,7 @@ def factory(name, repo_config, repo_defaults, repo_fallback_path,
         name = repo_config.get('name', name)
         repo_type = repo_config.get('type', 'git')
         commit = repo_config.get('commit', None)
-        tag = repo_config.get('tag', None)
+        tag = repo_config.get('tag', repo_defaults.get('tag', None))
         branch = repo_config.get('branch', repo_defaults.get('branch', None))
         refspec = repo_config.get('refspec',
                                   repo_defaults.get('refspec', None))
diff --git a/kas/schema-kas.json b/kas/schema-kas.json
index 8b9fc8a1..70320789 100644
--- a/kas/schema-kas.json
+++ b/kas/schema-kas.json
@@ -76,6 +76,9 @@
                         "branch": {
                             "type": "string"
                         },
+                        "tag": {
+                            "type": "string"
+                        },
                         "refspec": {
                             "type": "string"
                         },