diff --git a/apps/opencs/model/world/cellcoordinates.hpp b/apps/opencs/model/world/cellcoordinates.hpp
index edd2006ded..3b21195174 100644
--- a/apps/opencs/model/world/cellcoordinates.hpp
+++ b/apps/opencs/model/world/cellcoordinates.hpp
@@ -7,6 +7,8 @@
 
 #include <QMetaType>
 
+#include <osg/Vec3d>
+
 namespace CSMWorld
 {
     class CellCoordinates