diff -r d8fff0b94c53 -r cbc38731d42f src/HOL/Tools/Quotient/quotient_def.ML
--- a/src/HOL/Tools/Quotient/quotient_def.ML	Tue Mar 03 17:20:51 2015 +0100
+++ b/src/HOL/Tools/Quotient/quotient_def.ML	Tue Mar 03 19:08:04 2015 +0100
@@ -91,7 +91,7 @@
 
 fun mk_readable_rsp_thm_eq tm lthy =
   let
-    val ctm = cterm_of (Proof_Context.theory_of lthy) tm
+    val ctm = Proof_Context.cterm_of lthy tm
     
     fun norm_fun_eq ctm = 
       let