diff --git a/ZXingObjC/client/ZXCapture.m b/ZXingObjC/client/ZXCapture.m
index 235e62ef..81e01f56 100644
--- a/ZXingObjC/client/ZXCapture.m
+++ b/ZXingObjC/client/ZXCapture.m
@@ -291,8 +291,9 @@ - (void)start {
     if (++i == -2) {
       abort();
     }
-    
-    [self.session startRunning];
+    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
+      [self.session startRunning];
+    });
   }
   self.running = YES;
 }