diff --git a/libs/ardour/session.cc b/libs/ardour/session.cc
index 3897542d8d..538eedb750 100644
--- a/libs/ardour/session.cc
+++ b/libs/ardour/session.cc
@@ -44,8 +44,6 @@
 #include <glibmm/miscutils.h>
 #include <glibmm/fileutils.h>
 
-#include <boost/algorithm/string/erase.hpp>
-
 #include "pbd/atomic.h"
 #include "pbd/basename.h"
 #include "pbd/convert.h"
diff --git a/libs/ardour/session_process.cc b/libs/ardour/session_process.cc
index 2c3b1fe982..9d2116192e 100644
--- a/libs/ardour/session_process.cc
+++ b/libs/ardour/session_process.cc
@@ -26,8 +26,6 @@
 #include <algorithm>
 #include <unistd.h>
 
-#include <boost/algorithm/string/erase.hpp>
-
 #include "pbd/i18n.h"
 #include "pbd/error.h"
 #include "pbd/enumwriter.h"
diff --git a/libs/ardour/session_transport.cc b/libs/ardour/session_transport.cc
index 354f38e7a4..1937dbdca5 100644
--- a/libs/ardour/session_transport.cc
+++ b/libs/ardour/session_transport.cc
@@ -32,8 +32,6 @@
 #include <cerrno>
 #include <unistd.h>
 
-#include <boost/algorithm/string/erase.hpp>
-
 #include "pbd/atomic.h"
 #include "pbd/error.h"
 #include "pbd/enumwriter.h"