diff --git a/qt/scientific_interfaces/ISISReflectometry/Reduction/PerThetaDefaults.h b/qt/scientific_interfaces/ISISReflectometry/Reduction/PerThetaDefaults.h
index e7a8cb6a71b27808701aeba1d303dab3d3fb98aa..ccfeeb88bb1c18edacffad9fc39e9db9ada65dc3 100644
--- a/qt/scientific_interfaces/ISISReflectometry/Reduction/PerThetaDefaults.h
+++ b/qt/scientific_interfaces/ISISReflectometry/Reduction/PerThetaDefaults.h
@@ -10,9 +10,9 @@
 #include "ProcessingInstructions.h"
 #include "RangeInQ.h"
 #include "TransmissionRunPair.h"
+#include <array>
 #include <boost/optional.hpp>
 #include <string>
-#include <vector>
 namespace MantidQt {
 namespace CustomInterfaces {