diff -r 7cf837f1a8df -r 26f12f98f50a etc/isar-keywords-ZF.el
--- a/etc/isar-keywords-ZF.el	Fri Dec 17 17:48:05 2010 +0100
+++ b/etc/isar-keywords-ZF.el	Fri Dec 17 18:10:37 2010 +0100
@@ -189,6 +189,7 @@
     "txt_raw"
     "typ"
     "type_notation"
+    "type_synonym"
     "typed_print_translation"
     "typedecl"
     "types"
@@ -403,6 +404,7 @@
     "theorems"
     "translations"
     "type_notation"
+    "type_synonym"
     "typed_print_translation"
     "typedecl"
     "types"