diff --git a/src/plugins/projectexplorer/appoutputpane.cpp b/src/plugins/projectexplorer/appoutputpane.cpp
index 385c483b9c6..f03bf4c8ef5 100644
--- a/src/plugins/projectexplorer/appoutputpane.cpp
+++ b/src/plugins/projectexplorer/appoutputpane.cpp
@@ -3,6 +3,7 @@
 
 #include "appoutputpane.h"
 
+#include "project.h"
 #include "projectexplorer.h"
 #include "projectexplorerconstants.h"
 #include "projectexplorericons.h"
diff --git a/src/plugins/texteditor/commentssettings.h b/src/plugins/texteditor/commentssettings.h
index fd37a8e5b74..d4783cd624d 100644
--- a/src/plugins/texteditor/commentssettings.h
+++ b/src/plugins/texteditor/commentssettings.h
@@ -7,8 +7,6 @@
 
 #include <coreplugin/dialogs/ioptionspage.h>
 
-namespace ProjectExplorer { class Project; }
-
 namespace TextEditor {
 
 class TEXTEDITOR_EXPORT CommentsSettings