X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2FbasicTypes%2FBasicTypes.lhs;h=0dbd0f6c0991e9fd0d41948e5f5475d5a5bf84f8;hb=ef47b5c2f44fce638b623c9cf5bb2f7f62ba619d;hp=ab6d46347dca800e6c3d3f0953e38406a8b19629;hpb=d5bba9ee196f64a077e922680b16fe6f28fb79db;p=ghc-hetmet.git

diff --git a/compiler/basicTypes/BasicTypes.lhs b/compiler/basicTypes/BasicTypes.lhs
index ab6d463..0dbd0f6 100644
--- a/compiler/basicTypes/BasicTypes.lhs
+++ b/compiler/basicTypes/BasicTypes.lhs
@@ -295,6 +295,7 @@ data OverlapFlag
 		-- Without the Incoherent flag, we'd complain that
 		-- instantiating 'b' would change which instance 
 		-- was chosen
+  deriving( Eq )
 
 instance Outputable OverlapFlag where
    ppr NoOverlap  = empty