diff --git a/src/forward.rs b/src/forward.rs
index 14ad6f2..ff5c14f 100644
--- a/src/forward.rs
+++ b/src/forward.rs
@@ -23,7 +23,7 @@ pub async fn forward_query(
     let mut recv_buffer = BytePacketBuffer::new();
     let (size, _) = timeout(timeout_duration, socket.recv_from(&mut recv_buffer.buf)).await??;
 
-    if size >= recv_buffer.buf.len() {
+    if size == recv_buffer.buf.len() {
         log::debug!(
             "upstream response truncated ({} bytes, buffer {})",
             size,