diff --git a/tf2/src/buffer_core.cpp b/tf2/src/buffer_core.cpp
index 97fa96bca..f4333729c 100644
--- a/tf2/src/buffer_core.cpp
+++ b/tf2/src/buffer_core.cpp
@@ -1572,7 +1572,6 @@ void BufferCore::_chainAsVector(
 
   output.clear();  // empty vector
 
-  std::stringstream mstream;
   std::unique_lock<std::mutex> lock(frame_mutex_);
 
   TransformAccum accum;