1 files changed, 1 insertions, 0 deletions

diff --git a/chars.c b/chars.c
index 6370b219..9ca0d571 100644
--- a/chars.c
+++ b/chars.c
@@ -25,6 +25,7 @@
 #include <string.h>
 
 #include "mandoc.h"
+#include "mandoc_aux.h"
 #include "libmandoc.h"
 
 #define	PRINT_HI	 126