1 files changed, 2 insertions, 0 deletions
diff --git a/zix/patree.h b/zix/patree.h
index 35436c8..406fbf0 100644
--- a/zix/patree.h
+++ b/zix/patree.h
@@ -19,6 +19,8 @@
 
 #include "zix/common.h"
 
+#include <stdio.h>
+
 /**
    @addtogroup zix
    @{