diff --git a/lib/srfi/227.sld b/lib/srfi/227.sld
new file mode 100644
index 00000000..56395836
--- /dev/null
+++ b/lib/srfi/227.sld
@@ -0,0 +1,8 @@
+(define-library (srfi 227)
+  (export opt-lambda
+          (rename opt-lambda* opt*-lambda)
+          let-optionals
+          let-optionals*
+          (rename define-opt define-optionals)
+          (rename define-opt* define-optionals*))
+  (import (chibi optional)))