diff --git a/changelog.d/4972.misc b/changelog.d/4972.misc
new file mode 100644
index 000000000000..e104a9bb3429
--- /dev/null
+++ b/changelog.d/4972.misc
@@ -0,0 +1 @@
+Reduce log level of .well-known/matrix/client responses.
diff --git a/synapse/rest/well_known.py b/synapse/rest/well_known.py
index c0a4ae93e53f..0a70fffd9128 100644
--- a/synapse/rest/well_known.py
+++ b/synapse/rest/well_known.py
@@ -68,6 +68,6 @@ def render_GET(self, request):
             request.setHeader(b"Content-Type", b"text/plain")
             return b'.well-known not available'
 
-        logger.error("returning: %s", r)
+        logger.debug("returning: %s", r)
         request.setHeader(b"Content-Type", b"application/json")
         return json.dumps(r).encode("utf-8")