1 files changed, 1 insertions, 1 deletions
diff --git a/synapse/config/emailconfig.py b/synapse/config/emailconfig.py
index 893034e2ef..06b076e3f9 100644
--- a/synapse/config/emailconfig.py
+++ b/synapse/config/emailconfig.py
@@ -48,7 +48,7 @@ class EmailConfig(Config):
             if (len(missing) > 0):
                 raise RuntimeError(
                     "email.enable_notifs is True but required keys are missing: %s" %
-                    (", ".join(["email."+k for k in missing]),)
+                    (", ".join(["email." + k for k in missing]),)
                 )
 
             if config.get("public_baseurl") is None: