diff -r 1d43f86f48be -r e96292f32c3c src/HOL/Main.thy
--- a/src/HOL/Main.thy	Mon Dec 28 19:23:15 2015 +0100
+++ b/src/HOL/Main.thy	Mon Dec 28 21:47:32 2015 +0100
@@ -35,7 +35,7 @@
 
 hide_fact (open) id_bnf_def type_definition_id_bnf_UNIV
 
-no_syntax (xsymbols)
+no_syntax
   "_INF1"     :: "pttrns \<Rightarrow> 'b \<Rightarrow> 'b"           ("(3\<Sqinter>_./ _)" [0, 10] 10)
   "_INF"      :: "pttrn \<Rightarrow> 'a set \<Rightarrow> 'b \<Rightarrow> 'b"  ("(3\<Sqinter>_\<in>_./ _)" [0, 0, 10] 10)
   "_SUP1"     :: "pttrns \<Rightarrow> 'b \<Rightarrow> 'b"           ("(3\<Squnion>_./ _)" [0, 10] 10)