diff -r 7aaebfcf3134 -r 435fb018e8ee src/Tools/Code_Generator.thy
--- a/src/Tools/Code_Generator.thy	Thu Mar 28 21:22:44 2019 +0100
+++ b/src/Tools/Code_Generator.thy	Thu Mar 28 21:24:55 2019 +0100
@@ -11,7 +11,7 @@
   "export_code" "code_identifier" "code_printing" "code_reserved"
     "code_monad" "code_reflect" :: thy_decl and
   "checking" and
-  "datatypes" "functions" "module_name" "file"
+  "datatypes" "functions" "module_name" "file" "file_prefix"
     "constant" "type_constructor" "type_class" "class_relation" "class_instance" "code_module"
     :: quasi_command
 begin