diff -r 3298b7a2795a -r 84fc7dfa3cd4 src/FOLP/hypsubst.ML
--- a/src/FOLP/hypsubst.ML	Fri Mar 21 15:12:03 2014 +0100
+++ b/src/FOLP/hypsubst.ML	Fri Mar 21 20:33:56 2014 +0100
@@ -58,8 +58,8 @@
    assumption.  Returns the number of intervening assumptions, paried with
    the rule asm_rl (resp. sym). *)
 fun eq_var bnd =
-  let fun eq_var_aux k (Const("all",_) $ Abs(_,_,t)) = eq_var_aux k t
-        | eq_var_aux k (Const("==>",_) $ A $ B) =
+  let fun eq_var_aux k (Const(@{const_name Pure.all},_) $ Abs(_,_,t)) = eq_var_aux k t
+        | eq_var_aux k (Const(@{const_name Pure.imp},_) $ A $ B) =
               ((k, inspect_pair bnd (dest_eq A))
                       (*Exception Match comes from inspect_pair or dest_eq*)
                handle Match => eq_var_aux (k+1) B)