diff -r 9701dbc35f86 -r 4de48353034e src/FOL/IFOL.thy
--- a/src/FOL/IFOL.thy	Mon Feb 10 14:33:47 2014 +0100
+++ b/src/FOL/IFOL.thy	Mon Feb 10 17:20:11 2014 +0100
@@ -24,7 +24,7 @@
 
 setup Pure_Thy.old_appl_syntax_setup
 
-classes "term"
+class "term"
 default_sort "term"
 
 typedecl o