diff -r 17ca92ab4660 -r 9a86f0ef6503 Quot/Quotient_Sum.thy
--- a/Quot/Quotient_Sum.thy	Thu Feb 11 10:06:02 2010 +0100
+++ b/Quot/Quotient_Sum.thy	Thu Feb 11 14:00:00 2010 +0100
@@ -2,7 +2,7 @@
     Author:     Cezary Kaliszyk and Christian Urban
 *)
 theory Quotient_Sum
-imports Quotient
+imports Quotient Quotient_Syntax
 begin
 
 section {* Quotient infrastructure for the sum type. *}