diff --git a/disco/gateway/client.py b/disco/gateway/client.py
index 58ccc5b..75acd42 100644
--- a/disco/gateway/client.py
+++ b/disco/gateway/client.py
@@ -194,7 +194,7 @@ class GatewayClient(LoggingClass):
         if isinstance(error, KeyboardInterrupt):
             self.shutting_down = True
             self.ws_event.set()
-        raise Exception('WS recieved error: %s', error)
+        raise Exception('WS received error: {}'.format(error))
 
     def on_open(self):
         if self.zlib_stream_enabled:
diff --git a/disco/voice/client.py b/disco/voice/client.py
index 2a48346..8f6ce40 100644
--- a/disco/voice/client.py
+++ b/disco/voice/client.py
@@ -406,7 +406,7 @@ class VoiceClient(LoggingClass):
             channel_id = self.server_id
 
         if not channel_id:
-            raise VoiceException('[%s] cannot connect to an empty channel id', self)
+            raise VoiceException('[{}] cannot connect to an empty channel id'.format(self))
 
         if self.channel_id == channel_id:
             if self.state == VoiceState.CONNECTED: