diff --git a/xed/xed-utils.c b/xed/xed-utils.c
index cf97cde..83e1da0 100644
--- a/xed/xed-utils.c
+++ b/xed/xed-utils.c
@@ -904,6 +904,8 @@ xed_utils_is_valid_location (GFile *location)
     return is_valid;
 }
 
+static GtkWidget *handle_builder_error (const gchar *message, ...) G_GNUC_PRINTF (1, 2);
+
 static GtkWidget *
 handle_builder_error (const gchar *message,
                       ...)