diff -r 69eab2130c18 -r b6dd93370d8c src/relpipe-in-jack.cpp
--- a/src/relpipe-in-jack.cpp	Sat Oct 24 00:08:17 2020 +0200
+++ b/src/relpipe-in-jack.cpp	Sun Nov 21 20:41:58 2021 +0100
@@ -16,6 +16,7 @@
  */
 #include <memory>
 #include <csignal>
+#include <functional>
 
 #include <relpipe/writer/RelpipeWriterException.h>
 #include <relpipe/writer/Factory.h>