diff --git a/src/dolphinpart.h b/src/dolphinpart.h
index 9ab1e80ce8..70886d10d4 100644
--- a/src/dolphinpart.h
+++ b/src/dolphinpart.h
@@ -31,9 +31,7 @@ class QActionGroup;
 class KFileItemList;
 class KFileItem;
 class DolphinPartBrowserExtension;
-class DolphinSortFilterProxyModel;
 class DolphinRemoteEncoding;
-class DolphinModel;
 class KDirLister;
 class DolphinView;
 class KAboutData;
diff --git a/src/dolphinrecenttabsmenu.h b/src/dolphinrecenttabsmenu.h
index 910e564a19..dce032128b 100644
--- a/src/dolphinrecenttabsmenu.h
+++ b/src/dolphinrecenttabsmenu.h
@@ -23,7 +23,6 @@
 #include <KActionMenu>
 #include <KUrl>
 
-class DolphinTabPage;
 class QAction;
 
 class DolphinRecentTabsMenu : public KActionMenu
diff --git a/src/panels/places/placespanel.h b/src/panels/places/placespanel.h
index 16112e8b24..3078f0222b 100644
--- a/src/panels/places/placespanel.h
+++ b/src/panels/places/placespanel.h
@@ -25,7 +25,6 @@
 #include <panels/panel.h>
 
 class KItemListController;
-class PlacesItemEditDialog;
 class PlacesItem;
 class PlacesItemModel;
 class PlacesView;
diff --git a/src/search/dolphinfacetswidget.h b/src/search/dolphinfacetswidget.h
index 46c84ce1a2..03fb1279db 100644
--- a/src/search/dolphinfacetswidget.h
+++ b/src/search/dolphinfacetswidget.h
@@ -28,7 +28,6 @@
 #endif
 
 class QButtonGroup;
-class QCheckBox;
 class QDate;
 class QRadioButton;
 
diff --git a/src/search/filenamesearchprotocol.h b/src/search/filenamesearchprotocol.h
index f691f998b6..732aef942f 100644
--- a/src/search/filenamesearchprotocol.h
+++ b/src/search/filenamesearchprotocol.h
@@ -22,7 +22,6 @@
 
 #include <kio/slavebase.h>
 
-class KFileItem;
 class KUrl;
 class QRegExp;