1 files changed, 3 insertions, 3 deletions
diff --git a/gnuradio-runtime/lib/basic_block.cc b/gnuradio-runtime/lib/basic_block.cc
index 6061026a56..52a1a5e16b 100644
--- a/gnuradio-runtime/lib/basic_block.cc
+++ b/gnuradio-runtime/lib/basic_block.cc
@@ -173,15 +173,15 @@ void basic_block::_post(pmt::pmt_t which_port, pmt::pmt_t msg)
 void basic_block::insert_tail(pmt::pmt_t which_port, pmt::pmt_t msg)
 {
     gr::thread::scoped_lock guard(mutex);
-
-    if (msg_queue.find(which_port) == msg_queue.end()) {
+    const auto& queue = msg_queue.find(which_port);
+    if (queue == msg_queue.end()) {
         GR_LOG_ERROR(d_logger,
                      std::string("attempted insertion on invalid queue ") +
                          pmt::symbol_to_string(which_port));
         throw std::runtime_error("attempted to insert_tail on invalid queue!");
     }
 
-    msg_queue[which_port].push_back(msg);
+    queue->second.push_back(msg);
 
     // wake up thread if BLKD_IN or BLKD_OUT
     global_block_registry.notify_blk(d_symbol_name);