diff --git a/collects/framework/private/icon.ss b/collects/framework/private/icon.ss
index ee2f62bd..058d8685 100644
--- a/collects/framework/private/icon.ss
+++ b/collects/framework/private/icon.ss
@@ -1,5 +1,6 @@
 #lang scheme/unit
   (require (for-syntax scheme/base)
+           scheme/promise
            (lib "class.ss")
            (lib "include-bitmap.ss" "mrlib")
            "bday.ss"