Missing include.

diff --git a/include/xbt/backtrace.hpp b/include/xbt/backtrace.hpp
index 92199c8..27b9f8e 100644 (file)
--- a/include/xbt/backtrace.hpp
+++ b/include/xbt/backtrace.hpp
@@ -9,6 +9,7 @@
 #include <xbt/base.h>
 
 #include <cstddef>
 #include <xbt/base.h>
 
 #include <cstddef>

+#include <functional>

 #include <memory>
 #include <string>
 #include <vector>
 #include <memory>
 #include <string>
 #include <vector>