diff --git a/TESTS/mbed_drivers/stl_features/main.cpp b/TESTS/mbed_drivers/stl_features/main.cpp
index eda36c5819..a8a8f904e2 100644
--- a/TESTS/mbed_drivers/stl_features/main.cpp
+++ b/TESTS/mbed_drivers/stl_features/main.cpp
@@ -26,6 +26,7 @@
 #include <queue>
 #include <map>
 #include <math.h>
+#include <functional>
 
 using namespace utest::v1;