diff --git a/LEGO1/viewmanager.h b/LEGO1/viewmanager.h
index 3554c6c9..9abe5612 100644
--- a/LEGO1/viewmanager.h
+++ b/LEGO1/viewmanager.h
@@ -1,6 +1,8 @@
 #ifndef VIEWMANAGER_H
 #define VIEWMANAGER_H
 
+class ViewROI;
+
 class ViewManager
 {
 public: