diff --git a/include/nbd_proxy.hpp b/include/nbd_proxy.hpp
index 3f97f8c..ed5265d 100644
--- a/include/nbd_proxy.hpp
+++ b/include/nbd_proxy.hpp
@@ -193,7 +193,7 @@
             return;
         }
 
-        if (ws2uxBuf.empty())
+        if (ws2uxBuf.size() == 0)
         {
             BMCWEB_LOG_ERROR << "No data to write to UNIX socket";
             return;