diff --git a/lib/internal/streams/writable.js b/lib/internal/streams/writable.js
index 1081db9ffcf661..67beef44142d44 100644
--- a/lib/internal/streams/writable.js
+++ b/lib/internal/streams/writable.js
@@ -784,7 +784,7 @@ function clearBuffer(stream, state) {
     if (i === buffered.length) {
       resetBuffer(state);
     } else if (i > 256) {
-      buffered.splice(0, i);
+      state[kBufferedValue] = ArrayPrototypeSlice(buffered, i);
       state.bufferedIndex = 0;
     } else {
       state.bufferedIndex = i;