diff --git a/ChangeLog b/ChangeLog
index 987424762..1536749ce 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2008-05-21  Tatsuhiro Tsujikawa  <tujikawa at rednoah dot com>
+
+	* src/ChunkChecksum.h (getChecksum): Return const reference.
+
 2008-05-20  Tatsuhiro Tsujikawa  <tujikawa at rednoah dot com>
 
 	Fixed compile error when configured with --disable-metalink.
diff --git a/src/ChunkChecksum.h b/src/ChunkChecksum.h
index afa20ba9b..1387e47b6 100644
--- a/src/ChunkChecksum.h
+++ b/src/ChunkChecksum.h
@@ -78,7 +78,7 @@ public:
     return _checksums.size();
   }
 
-  std::string getChecksum(size_t index) const
+  const std::string& getChecksum(size_t index) const
   {
     if(index < _checksums.size()) {
       return _checksums[index];