diff --git a/x-pack/plugin/blob-cache/src/main/java/org/elasticsearch/blobcache/common/BlobCacheBufferedIndexInput.java b/x-pack/plugin/blob-cache/src/main/java/org/elasticsearch/blobcache/common/BlobCacheBufferedIndexInput.java
index 16645e7523c36..7e7e954d1fa72 100644
--- a/x-pack/plugin/blob-cache/src/main/java/org/elasticsearch/blobcache/common/BlobCacheBufferedIndexInput.java
+++ b/x-pack/plugin/blob-cache/src/main/java/org/elasticsearch/blobcache/common/BlobCacheBufferedIndexInput.java
@@ -175,7 +175,7 @@ public final int readVInt() throws IOException {
 
     @Override
     public final long readVLong() throws IOException {
-        if (9 <= buffer.remaining()) {
+        if (10 <= buffer.remaining()) {
             return ByteBufferStreamInput.readVLong(buffer);
         } else {
             return super.readVLong();