4 files changed, 5 insertions, 3 deletions
diff --git a/src/ui/dialog/xml-tree.h b/src/ui/dialog/xml-tree.h
index 9d2fac71f..0a6e3a786 100644
--- a/src/ui/dialog/xml-tree.h
+++ b/src/ui/dialog/xml-tree.h
@@ -28,7 +28,7 @@
 #include "ui/dialog/desktop-tracker.h"
 #include "message.h"
 
-struct SPDesktop;
+class SPDesktop;
 struct SPObject;
 struct SPXMLViewAttrList;
 struct SPXMLViewContent;
diff --git a/src/ui/tool/path-manipulator.h b/src/ui/tool/path-manipulator.h
index a51b8c410..cb4f69b9a 100644
--- a/src/ui/tool/path-manipulator.h
+++ b/src/ui/tool/path-manipulator.h
@@ -21,7 +21,7 @@
 #include "ui/tool/manipulator.h"
 
 struct SPCanvasItem;
-struct SPCurve;
+class SPCurve;
 struct SPPath;
 
 namespace Inkscape {
diff --git a/src/ui/view/view-widget.h b/src/ui/view/view-widget.h
index 668f9d19a..295e7932b 100644
--- a/src/ui/view/view-widget.h
+++ b/src/ui/view/view-widget.h
@@ -23,7 +23,7 @@ class View;
 } // namespace Inkscape
 
 class SPViewWidget;
-class SPNamedView;
+struct SPNamedView;
 
 #define SP_TYPE_VIEW_WIDGET (sp_view_widget_get_type ())
 #define SP_VIEW_WIDGET(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), SP_TYPE_VIEW_WIDGET, SPViewWidget))
diff --git a/src/ui/widget/object-composite-settings.h b/src/ui/widget/object-composite-settings.h
index d3a208525..c7c09a816 100644
--- a/src/ui/widget/object-composite-settings.h
+++ b/src/ui/widget/object-composite-settings.h
@@ -21,6 +21,8 @@
 #include "ui/widget/filter-effect-chooser.h"
 #include "ui/widget/spinbutton.h"
 
+class SPDesktop;
+
 namespace Inkscape {
 class Application;