diff --git a/src/fuse_open.cpp b/src/fuse_open.cpp
index 9806ee2f..6052ac2b 100644
--- a/src/fuse_open.cpp
+++ b/src/fuse_open.cpp
@@ -29,6 +29,8 @@
 
 #include "fuse.h"
 
+#include "boost/unordered/concurrent_flat_map.hpp"
+
 #include <set>
 #include <string>
 #include <vector>