diff --git a/Mesh_3/demo/Mesh_3/Scene_implicit_function_item_config.h b/Mesh_3/demo/Mesh_3/Scene_implicit_function_item_config.h
index 0c8d1b3a212..408abd106c4 100644
--- a/Mesh_3/demo/Mesh_3/Scene_implicit_function_item_config.h
+++ b/Mesh_3/demo/Mesh_3/Scene_implicit_function_item_config.h
@@ -1,7 +1,7 @@
 #ifndef SCENE_IMPLICIT_FUNCTION_ITEM_CONFIG_H
 #define SCENE_IMPLICIT_FUNCTION_ITEM_CONFIG_H
 
-#ifdef scene_segmented_image_item_EXPORTS
+#ifdef scene_implicit_function_item_EXPORTS
 #  define SCENE_IMPLICIT_FUNCTION_ITEM_EXPORT Q_DECL_EXPORT
 #else
 #  define SCENE_IMPLICIT_FUNCTION_ITEM_EXPORT Q_DECL_IMPORT