diff --git a/mojo/services/network/http_client.h b/mojo/services/network/http_client.h
index 6e3e672..4619473 100644
--- a/mojo/services/network/http_client.h
+++ b/mojo/services/network/http_client.h
@@ -269,6 +269,11 @@
       MojoResult result = BeginWriteDataRaw(response_body_stream_.get(),
                                             &buf, &num_bytes,
                                             MOJO_WRITE_DATA_FLAG_NONE);
+      if (result == MOJO_RESULT_SHOULD_WAIT) {
+        // TODO(toshik): we should handle this condition with AsyncWaiter
+        usleep(1000);
+        continue;
+      }
       if (result != MOJO_RESULT_OK) {
         std::cout << "Warning: SendBody: BeginWriteDataRAW: result="
                   << result << std::endl;