diff --git a/hmmlib/hmmlib.l b/hmmlib/hmmlib.l
index 0d5b8ee..fae3858 100644
--- a/hmmlib/hmmlib.l
+++ b/hmmlib/hmmlib.l
@@ -236,12 +236,12 @@ static void _hmml_free_anno(HMML_Annotation* a){
 	free(a->author);
 	sb_free(a->text);
 
-	for(size_t j = 0; j < a->reference_count; ++j){
+	for(size_t j = 0; j < sb_count(a->references); ++j){
 		_hmml_free_ref(a->references + j);
 	}
 	sb_free(a->references);
 
-	for(size_t j = 0; j < a->marker_count; ++j){
+	for(size_t j = 0; j < sb_count(a->markers); ++j){
 		free(a->markers[j].text);
 	}
 	sb_free(a->markers);