diff --git a/messagelist/src/CMakeLists.txt b/messagelist/src/CMakeLists.txt
--- a/messagelist/src/CMakeLists.txt
+++ b/messagelist/src/CMakeLists.txt
@@ -94,7 +94,6 @@
     View
     Enums
     StorageModelBase
-    WidgetBase
     REQUIRED_HEADERS MessageList_core_HEADERS
     RELATIVE core
     PREFIX MessageList
diff --git a/messagelist/src/widget.h b/messagelist/src/widget.h
--- a/messagelist/src/widget.h
+++ b/messagelist/src/widget.h
@@ -19,7 +19,7 @@
 #ifndef MESSAGELIST_WIDGET_H
 #define MESSAGELIST_WIDGET_H
 
-#include <MessageList/WidgetBase>
+#include "core/widgetbase.h"
 #include <MessageList/View>
 #include <MessageList/QuickSearchLine>