diff --git a/pollen/render.rkt b/pollen/render.rkt
index 094de78..071ecb6 100644
--- a/pollen/render.rkt
+++ b/pollen/render.rkt
@@ -2,6 +2,7 @@
 (require racket/file
          racket/path
          racket/match
+         racket/string
          racket/format
          racket/place
          racket/list