diff --git a/source/RobotAPI/libraries/GraspingUtility/GraspTrajectory.h b/source/RobotAPI/libraries/GraspingUtility/GraspTrajectory.h
index b2f1336a5b3bba2d41cb2ded49943cf778ddf309..a2aaac406ade30789e1eca5f3a4e62cb313027b7 100644
--- a/source/RobotAPI/libraries/GraspingUtility/GraspTrajectory.h
+++ b/source/RobotAPI/libraries/GraspingUtility/GraspTrajectory.h
@@ -25,6 +25,7 @@
 
 #include <map>
 #include <memory>
+#include <optional>
 
 #include <Eigen/Core>
 
@@ -32,7 +33,6 @@
 
 #include <RobotAPI/interface/units/GraspCandidateProviderInterface.h>
 #include <RobotAPI/libraries/diffik/SimpleDiffIK.h>
-#include <optional>
 
 namespace armarx
 {