diff --git a/srfi/111.sld b/srfi/111.sld
new file mode 100644
index 00000000..b1e20883
--- /dev/null
+++ b/srfi/111.sld
@@ -0,0 +1,9 @@
+(define-library (srfi 111)
+  (import (scheme base))
+  (export box box? unbox set-box!)
+  
+  (begin
+    (define-record-type box-type
+      (box value)
+      box?
+      (value unbox set-box!))))