diff --git a/collects/images/tests/effects-tests.rkt b/collects/images/tests/effects-tests.rkt
index d096e4aac4..b44dee01e5 100644
--- a/collects/images/tests/effects-tests.rkt
+++ b/collects/images/tests/effects-tests.rkt
@@ -2,7 +2,7 @@
 
 (require images/gui
          images/compile-time
-         (for-syntax racket/math
+         (for-syntax racket/flonum racket/math
                      images/private/flomap
                      images/logos)
          images/private/flomap