diff --git a/include/openspace/engine/openspaceengine.h b/include/openspace/engine/openspaceengine.h
index e3b823f2e5..1c7ac2db50 100644
--- a/include/openspace/engine/openspaceengine.h
+++ b/include/openspace/engine/openspaceengine.h
@@ -30,6 +30,7 @@
 
 #include <ghoul/glm.h>
 
+#include <functional>
 #include <memory>
 #include <string>
 #include <vector>