1 files changed, 3 insertions, 2 deletions
diff --git a/zix/tree.h b/zix/tree.h
index c18ae3d..64b91f1 100644
--- a/zix/tree.h
+++ b/zix/tree.h
@@ -17,10 +17,11 @@
 #ifndef ZIX_TREE_H
 #define ZIX_TREE_H
 
-#include <stddef.h>
-
 #include "zix/common.h"
 
+#include <stdbool.h>
+#include <stddef.h>
+
 #ifdef __cplusplus
 extern "C" {
 #endif