diff --git a/util/gmime-extra.c b/util/gmime-extra.c
index 4a591cae..d1bb1d47 100644
--- a/util/gmime-extra.c
+++ b/util/gmime-extra.c
@@ -27,9 +27,9 @@ _gzfile_maybe_filter (GMimeStream *file_stream) {
 	    return NULL;
 
 	/* ignore filter id */
-	(void)g_mime_stream_filter_add ((GMimeStreamFilter *)gzstream, gzfilter);
-	g_object_unref(gzfilter);
-	g_object_unref(file_stream);
+	(void) g_mime_stream_filter_add ((GMimeStreamFilter *) gzstream, gzfilter);
+	g_object_unref (gzfilter);
+	g_object_unref (file_stream);
 	return gzstream;
     } else {
 	return file_stream;