diff --git a/example/asio.cpp b/example/asio.cpp
index ebde8bd..bb59cc1 100644
--- a/example/asio.cpp
+++ b/example/asio.cpp
@@ -14,6 +14,7 @@
 #include <boost/leaf/handle_all.hpp>
 #include <boost/leaf/result.hpp>
 #include <iostream>
+#include <functional>
 #include <deque>
 #include <cstdlib>
 
@@ -75,7 +76,7 @@ struct e_error_trace
 
 #define ERROR_TRACE auto _trace = leaf::accumulate( [ ]( e_error_trace & tr ) { tr.value.emplace_front(e_error_trace::rec{__FILE__, __LINE__}); } )
 
-int const failure_percent = 5;
+int const failure_percent = 10;
 
 leaf::result<int> simulate_failure_point( int value ) noexcept
 {
diff --git a/test/continuation_test.cpp b/test/continuation_test.cpp
index f4d61b3..c5b55fa 100644
--- a/test/continuation_test.cpp
+++ b/test/continuation_test.cpp
@@ -8,6 +8,7 @@
 #include <boost/leaf/handle_all.hpp>
 #include <boost/leaf/result.hpp>
 #include <deque>
+#include <functional>
 #include "boost/core/lightweight_test.hpp"
 
 namespace asio_simulator