5 files changed, 5 insertions, 0 deletions
diff --git a/src/ui/dialog/desktop-tracker.h b/src/ui/dialog/desktop-tracker.h
index edde110af..d73071194 100644
--- a/src/ui/dialog/desktop-tracker.h
+++ b/src/ui/dialog/desktop-tracker.h
@@ -11,6 +11,7 @@
 #ifndef SEEN_DIALOG_DESKTOP_TRACKER
 #define SEEN_DIALOG_DESKTOP_TRACKER
 
+#include <stddef.h>
 #include <sigc++/connection.h>
 #include <glib/gtypes.h>
 
diff --git a/src/ui/dialog/document-metadata.h b/src/ui/dialog/document-metadata.h
index 21915c00f..8194b9920 100644
--- a/src/ui/dialog/document-metadata.h
+++ b/src/ui/dialog/document-metadata.h
@@ -14,6 +14,7 @@
 #define INKSCAPE_UI_DIALOG_DOCUMENT_METADATA_H
 
 #include <list>
+#include <stddef.h>
 #include <sigc++/sigc++.h>
 #include <gtkmm/notebook.h>
 #include <glibmm/i18n.h>
diff --git a/src/ui/dialog/document-properties.h b/src/ui/dialog/document-properties.h
index dbefca235..b88f0db26 100644
--- a/src/ui/dialog/document-properties.h
+++ b/src/ui/dialog/document-properties.h
@@ -15,6 +15,7 @@
 #define INKSCAPE_UI_DIALOG_DOCUMENT_PREFERENCES_H
 
 #include <list>
+#include <stddef.h>
 #include <sigc++/sigc++.h>//
 #include <gtkmm/notebook.h>
 #include <glibmm/i18n.h>
diff --git a/src/ui/dialog/inkscape-preferences.h b/src/ui/dialog/inkscape-preferences.h
index f09409d4a..a20278551 100644
--- a/src/ui/dialog/inkscape-preferences.h
+++ b/src/ui/dialog/inkscape-preferences.h
@@ -28,6 +28,7 @@
 #include <gtkmm/frame.h>
 #include <gtkmm/notebook.h>
 #include "ui/widget/preferences-widget.h"
+#include <stddef.h>
 #include <sigc++/sigc++.h>
 #include <glibmm/i18n.h>
 #include <gtkmm/textview.h>
diff --git a/src/ui/dialog/undo-history.cpp b/src/ui/dialog/undo-history.cpp
index 17d032758..e6f113e48 100644
--- a/src/ui/dialog/undo-history.cpp
+++ b/src/ui/dialog/undo-history.cpp
@@ -15,6 +15,7 @@
 
 #include <glibmm/i18n.h>
 #include <gtk/gtkimage.h>
+#include <stddef.h>
 #include <sigc++/sigc++.h>