1 files changed, 2 insertions, 1 deletions
diff --git a/src/fbuf.c b/src/fbuf.c
index 69a3475..33a7d6e 100644
--- a/src/fbuf.c
+++ b/src/fbuf.c
@@ -115,7 +115,8 @@ char* bstringify(struct TMPL_buf* b, size_t* size){
 
 	b->head = single;
 	b->tail = single;
-	*size = b->total_len;
+	if(size != NULL)
+		*size = b->total_len;
 
 	return single->data;
 }