diff --git a/src/gcal-source-dialog.c b/src/gcal-source-dialog.c
index 051645f7..4f2f0ecc 100644
--- a/src/gcal-source-dialog.c
+++ b/src/gcal-source-dialog.c
@@ -26,6 +26,14 @@ typedef struct
   GcalManager        *manager;
 } GcalSourceDialogPrivate;
 
+struct _GcalSourceDialog
+{
+  GtkDialog parent;
+
+  /*< private >*/
+  GcalSourceDialogPrivate *priv;
+};
+
 G_DEFINE_TYPE_WITH_PRIVATE (GcalSourceDialog, gcal_source_dialog, GTK_TYPE_DIALOG)
 
 enum {
diff --git a/src/gcal-source-dialog.h b/src/gcal-source-dialog.h
index 8c4962b0..8b074f3e 100644
--- a/src/gcal-source-dialog.h
+++ b/src/gcal-source-dialog.h
@@ -21,6 +21,7 @@
 #define GCAL_SOURCE_DIALOG_H
 
 #include <glib-object.h>
+#include "gcal-manager.h"
 
 #include <gtk/gtk.h>