diff --git a/briar_wrapper/models/socket_listener.py b/briar_wrapper/models/socket_listener.py
index 0860e1697d0c9e7c8e70de662bb7b3f8c8bcef5b..8a4bacffd067f808c52ed8f64fa314278326574a 100644
--- a/briar_wrapper/models/socket_listener.py
+++ b/briar_wrapper/models/socket_listener.py
@@ -59,8 +59,8 @@ class SocketListener():  # pylint: disable=too-few-public-methods
                 self._watch_messages(websocket))
 
     def _call_signal_callbacks(self, message):
-            self._signals_lock.acquire()
-            for signal in self._signals:
-                if signal["event"] == message['name']:
-                    signal["callback"](message)
-            self._signals_lock.release()
+        self._signals_lock.acquire()
+        for signal in self._signals:
+            if signal["event"] == message['name']:
+                signal["callback"](message)
+        self._signals_lock.release()