diff --git a/src/gcal-source-dialog.c b/src/gcal-source-dialog.c
index 982eebc2..fd061589 100644
--- a/src/gcal-source-dialog.c
+++ b/src/gcal-source-dialog.c
@@ -282,6 +282,7 @@ gcal_source_dialog_set_manager (GcalSourceDialog *dialog,
  *
  * Returns:
  */
+void
 gcal_source_dialog_set_mode (GcalSourceDialog    *dialog,
                              GcalSourceDialogMode mode)
 {