1 files changed, 1 insertions, 1 deletions
diff --git a/src/zix/tree.c b/src/zix/tree.c
index c8a5bb4..dd6be5d 100644
--- a/src/zix/tree.c
+++ b/src/zix/tree.c
@@ -107,7 +107,7 @@ zix_tree_free(ZixTree* t)
 }
 
 size_t
-zix_tree_size(ZixTree* t)
+zix_tree_size(const ZixTree* t)
 {
 	return t->size;
 }