diff --git a/src/barcodescanner.ios.ts b/src/barcodescanner.ios.ts
index e5f2a0a..f1b7369 100644
--- a/src/barcodescanner.ios.ts
+++ b/src/barcodescanner.ios.ts
@@ -16,8 +16,10 @@ export class BarcodeScannerView extends BarcodeScannerBaseView {
     super();
     this._hasSupport = AVCaptureDevice.defaultDeviceWithMediaType(AVMediaTypeVideo) !== null;
     if (this._hasSupport) {
-      // play nice with others
-      AVAudioSession.sharedInstance().setCategoryModeOptionsError(AVAudioSessionCategoryPlayback, AVAudioSessionModeDefault, AVAudioSessionCategoryOptions.MixWithOthers);
+      if (typeof AVAudioSession.sharedInstance().setCategoryModeOptionsError === "function") {
+        // if music was playing, it would stop unless we do this:
+        AVAudioSession.sharedInstance().setCategoryModeOptionsError(AVAudioSessionCategoryPlayback, AVAudioSessionModeDefault, AVAudioSessionCategoryOptions.MixWithOthers);
+      }
     }
   }
 
@@ -90,8 +92,10 @@ export class BarcodeScanner {
   private _device: AVCaptureDevice;
 
   constructor() {
-    // play nice with others
-    AVAudioSession.sharedInstance().setCategoryModeOptionsError(AVAudioSessionCategoryPlayback, AVAudioSessionModeDefault, AVAudioSessionCategoryOptions.MixWithOthers);
+    if (typeof AVAudioSession.sharedInstance().setCategoryModeOptionsError === "function") {
+      // if music was playing, it would stop unless we do this:
+      AVAudioSession.sharedInstance().setCategoryModeOptionsError(AVAudioSessionCategoryPlayback, AVAudioSessionModeDefault, AVAudioSessionCategoryOptions.MixWithOthers);
+    }
 
     this._device = AVCaptureDevice.defaultDeviceWithMediaType(AVMediaTypeVideo);
     if (this._device && this._device.hasTorch && this._device.hasFlash) {