diff --git a/src/main/java/io/github/azagniotov/lucene/analysis/ja/sudachi/tokenizer/SudachiTokenizer.java b/src/main/java/io/github/azagniotov/lucene/analysis/ja/sudachi/tokenizer/SudachiTokenizer.java
index 1a9beb9..5f1a075 100644
--- a/src/main/java/io/github/azagniotov/lucene/analysis/ja/sudachi/tokenizer/SudachiTokenizer.java
+++ b/src/main/java/io/github/azagniotov/lucene/analysis/ja/sudachi/tokenizer/SudachiTokenizer.java
@@ -115,7 +115,9 @@ public boolean incrementToken() throws IOException {
         }
 
         clearAttributes();
-        this.termAtt.append(morpheme.surface());
+        // this.termAtt.append(morpheme.surface());
+        final String surface = morpheme.surface();
+        this.termAtt.copyBuffer(surface.toCharArray(), 0, surface.length());
 
         final int baseOffset = morphemeIterator.getBaseOffset();
         final int startOffset = correctOffset(baseOffset + morpheme.begin());