diff --git a/synapse/storage/__init__.py b/synapse/storage/__init__.py
index 09f24a5c8..f4dec7039 100644
--- a/synapse/storage/__init__.py
+++ b/synapse/storage/__init__.py
@@ -51,7 +51,7 @@ logger = logging.getLogger(__name__)
 
 # Remember to update this number every time a change is made to database
 # schema files, so the users will be informed on server restarts.
-SCHEMA_VERSION = 16
+SCHEMA_VERSION = 15
 
 dir_path = os.path.abspath(os.path.dirname(__file__))