diff --git a/synapse/rest/client/v2_alpha/sync.py b/synapse/rest/client/v2_alpha/sync.py
index 6dcc407451..2939896f44 100644
--- a/synapse/rest/client/v2_alpha/sync.py
+++ b/synapse/rest/client/v2_alpha/sync.py
@@ -110,7 +110,7 @@ class SyncRestServlet(RestServlet):
         filter_id = parse_string(request, "filter", default=None)
         full_state = parse_boolean(request, "full_state", default=False)
 
-        logger.info(
+        logger.debug(
             "/sync: user=%r, timeout=%r, since=%r,"
             " set_presence=%r, filter_id=%r, device_id=%r" % (
                 user, timeout, since, set_presence, filter_id, device_id