diff --git a/comphelper/source/eventattachermgr/eventattachermgr.cxx b/comphelper/source/eventattachermgr/eventattachermgr.cxx
index d7936a098af9..7cfce7f97074 100644
--- a/comphelper/source/eventattachermgr/eventattachermgr.cxx
+++ b/comphelper/source/eventattachermgr/eventattachermgr.cxx
@@ -57,6 +57,7 @@
 
 #include <deque>
 #include <algorithm>
+#include <functional>
 
 using namespace com::sun::star::uno;
 using namespace com::sun::star::io;