diff --git a/ghc/compiler/utils/Outputable.lhs b/ghc/compiler/utils/Outputable.lhs
index e09d59da17441debc32b81e9542c3d3ca534df2d..c34404b2f8e9970426cf029af65b5d8d9b352872 100644
--- a/ghc/compiler/utils/Outputable.lhs
+++ b/ghc/compiler/utils/Outputable.lhs
@@ -246,6 +246,7 @@ class Outputable a where
 
 \begin{code}
 instance Outputable Bool where
+    ppr True  = ptext SLIT("True")
     ppr False = ptext SLIT("False")
 
 instance Outputable Int where