diff --git a/include/Context.h b/include/Context.h
index 1888b22..1eb3cbb 100644
--- a/include/Context.h
+++ b/include/Context.h
@@ -4,6 +4,7 @@
 #include <atomic>
 #include "concurrency.h"
 #include "FrameTexture.h"
+#include <functional>
 
 namespace glvideo {
 typedef std::function< void( void ) > context_job;