clean up for unix port
diff --git a/src/lib9/fmt/charstod.c b/src/lib9/fmt/charstod.c
index ec403b1..65a4e18 100644
--- a/src/lib9/fmt/charstod.c
+++ b/src/lib9/fmt/charstod.c
@@ -13,7 +13,7 @@
  */
 #include <stdarg.h>
 #include <string.h>
-#include "utf.h"
+#include "plan9.h"
 #include "fmt.h"
 #include "fmtdef.h"