diff --git a/compiler/types/TypeRep.lhs b/compiler/types/TypeRep.lhs
index c6293c8bc0f4..ef79974605e9 100644
--- a/compiler/types/TypeRep.lhs
+++ b/compiler/types/TypeRep.lhs
@@ -140,7 +140,7 @@ data Type
 	Var         -- Type or kind variable
 	Type	        -- ^ A polymorphic type
 
-  | LitTy TyLit     -- ^ Type literals are simillar to type constructors.
+  | LitTy TyLit     -- ^ Type literals are similar to type constructors.
 
   deriving (Data.Data, Data.Typeable)