diff --git a/plyer/platforms/ios/voip.py b/plyer/platforms/ios/voip.py
index cecead0f..49c62a42 100644
--- a/plyer/platforms/ios/voip.py
+++ b/plyer/platforms/ios/voip.py
@@ -22,7 +22,6 @@
 AVAudioFormat = autoclass("AVAudioFormat")
 VoipMachine = autoclass('Voip')
 AVAudioSession = autoclass("AVAudioSession")
-NSData = autoclass('NSData')
 NSError = autoclass("NSError")
 
 class iOSVoip(Voip):
@@ -189,4 +188,4 @@ def _end_call(self):
             Logger.info("VOIP: Call ended")
 
 def instance():
-    return iOSVoip()
\ No newline at end of file
+    return iOSVoip()