diff --git a/gateway/run.py b/gateway/run.py
index b6949fc8df7c..1187f03883e1 100644
--- a/gateway/run.py
+++ b/gateway/run.py
@@ -904,7 +904,7 @@ class GatewayRunner:
             os.getenv(v)
             for v in ("TELEGRAM_ALLOWED_USERS", "DISCORD_ALLOWED_USERS",
                        "WHATSAPP_ALLOWED_USERS", "SLACK_ALLOWED_USERS",
-                       "SMS_ALLOWED_USERS",
+                       "SMS_ALLOWED_USERS", "MATRIX_ALLOWED_USERS",
                        "GATEWAY_ALLOWED_USERS")
         )
         _allow_all = os.getenv("GATEWAY_ALLOW_ALL_USERS", "").lower() in ("true", "1", "yes")