diff --git a/compile-r7rs.scm b/compile-r7rs.scm
index c8761f0..6fcd9ae 100644
--- a/compile-r7rs.scm
+++ b/compile-r7rs.scm
@@ -1,6 +1,7 @@
 (import (scheme base)
         (scheme file)
         (scheme read)
+        (scheme write)
         (scheme process-context)
         (foreign c)
         (libs util)