diff --git a/hosts/ocaml/bin/sx_server.ml b/hosts/ocaml/bin/sx_server.ml
index 3ce91d3..4a5be83 100644
--- a/hosts/ocaml/bin/sx_server.ml
+++ b/hosts/ocaml/bin/sx_server.ml
@@ -1066,7 +1066,7 @@ let rec dispatch env cmd =
     let compiler_fns = ["compile"; "compile-module"; "compile-expr";
       "compile-symbol"; "compile-dict"; "compile-list"; "compile-if";
       "compile-when"; "compile-and"; "compile-or"; "compile-begin";
-      "compile-let"; "compile-lambda"; "compile-define"; "compile-set";
+      "compile-let"; "compile-letrec"; "compile-lambda"; "compile-define"; "compile-set";
       "compile-quote"; "compile-cond"; "compile-case"; "compile-case-clauses";
       "compile-thread"; "compile-thread-step"; "compile-defcomp";
       "compile-defmacro"; "compile-quasiquote"; "compile-call";