diff --git a/collects/lang/htdp-advanced.ss b/collects/lang/htdp-advanced.ss
index 1e2bad565f..b36a3e4d1c 100644
--- a/collects/lang/htdp-advanced.ss
+++ b/collects/lang/htdp-advanced.ss
@@ -16,6 +16,7 @@
             [advanced-define define]
             [advanced-define-struct define-struct]
             [advanced-lambda lambda]
+            [advanced-lambda λ]
             [advanced-app #%app]
             [beginner-top #%top]
             [intermediate-local local]
diff --git a/collects/lang/htdp-intermediate-lambda.ss b/collects/lang/htdp-intermediate-lambda.ss
index b5be5e7a43..338a803f47 100644
--- a/collects/lang/htdp-intermediate-lambda.ss
+++ b/collects/lang/htdp-intermediate-lambda.ss
@@ -12,6 +12,7 @@
             [intermediate-lambda-define define]
             [intermediate-define-struct define-struct]
             [intermediate-lambda lambda]
+            [intermediate-lambda λ]
             [advanced-app #%app]
             [beginner-top #%top]
             [intermediate-local local]