diff --git a/libs/ardour/audiosource.cc b/libs/ardour/audiosource.cc
index 49cfc15a54..d09a9b29cd 100644
--- a/libs/ardour/audiosource.cc
+++ b/libs/ardour/audiosource.cc
@@ -20,7 +20,6 @@
 #include <sys/stat.h>
 #include <unistd.h>
 #include <fcntl.h>
-#include <poll.h>
 #include <float.h>
 #include <utime.h>
 #include <cerrno>