diff -r 12a514e0319a -r 2c9ed7478e6e src/HOL/Number_Theory/Cong.thy
--- a/src/HOL/Number_Theory/Cong.thy	Wed Jun 02 16:24:14 2010 +0200
+++ b/src/HOL/Number_Theory/Cong.thy	Wed Jun 02 16:24:14 2010 +0200
@@ -30,7 +30,7 @@
 header {* Congruence *}
 
 theory Cong
-imports GCD Primes
+imports Primes
 begin
 
 subsection {* Turn off One_nat_def *}