diff --git a/arm_compute/graph/Workload.h b/arm_compute/graph/Workload.h
index 5ca9fd6..35066c4 100644
--- a/arm_compute/graph/Workload.h
+++ b/arm_compute/graph/Workload.h
@@ -26,6 +26,7 @@
 
 #include "arm_compute/runtime/IFunction.h"
 
+#include <functional>
 #include <memory>
 #include <vector>