diff --git a/include/gargoyle/twine.h b/include/gargoyle/twine.h
index fcd5976..c4fe5a6 100644
--- a/include/gargoyle/twine.h
+++ b/include/gargoyle/twine.h
@@ -1,6 +1,7 @@
 #ifndef __GARGOYLE_TWINE_H_
 #define __GARGOYLE_TWINE_H_
 
+#include <gargoyle/codex.h>
 #include <stdint.h>
 
 uint8_t is_sep(char tok);