diff --git a/xconv.c b/xconv.c
index 03ea326..a6c6aad 100644
--- a/xconv.c
+++ b/xconv.c
@@ -6,6 +6,7 @@
 #include <string.h>
 #include <jim.h>
 #include <jim-config.h>
+#include <utf8.h>
 #include <xconv.h>
 
 static int