diff --git a/Src/Main/Shared/Peertalk/Lookin_PTProtocol.m b/Src/Main/Shared/Peertalk/Lookin_PTProtocol.m
index 72e85f8..dc3c3f3 100644
--- a/Src/Main/Shared/Peertalk/Lookin_PTProtocol.m
+++ b/Src/Main/Shared/Peertalk/Lookin_PTProtocol.m
@@ -246,6 +246,9 @@ - (void)readPayloadOfSize:(size_t)payloadSize overChannel:(dispatch_io_t)channel
   __block dispatch_data_t allData = NULL;
   dispatch_io_read(channel, 0, payloadSize, queue_, ^(bool done, dispatch_data_t data, int error) {
     //NSLog(@"dispatch_io_read: done=%d data=%p error=%d", done, data, error);
+    if (data == nil) {
+        return;
+    }
     size_t dataSize = dispatch_data_get_size(data);
     
     if (dataSize) {