diff --git a/layer4/routes.go b/layer4/routes.go
index dea307e..5cd04ec 100644
--- a/layer4/routes.go
+++ b/layer4/routes.go
@@ -125,7 +125,7 @@ func (routes RouteList) Compile(logger *zap.Logger, matchingTimeout time.Duratio
 		for {
 			// only prefetch is needed, it's useful in case a RouteList in another RouteList cases
 			// if some matchers returned ErrConsumedAllPrefetchedBytes, it's true anyway
-			if len(cx.buf) == 0 || len(cx.buf) == cx.offset {
+			if len(cx.buf) == 0 || len(cx.buf[cx.offset:]) == 0 {
 				err = cx.prefetch()
 				if err != nil {
 					logFunc := logger.Error