diff --git a/src/Language/Java/Classfile.hs b/src/Language/Java/Classfile.hs
index 74251e6..81c02de 100644
--- a/src/Language/Java/Classfile.hs
+++ b/src/Language/Java/Classfile.hs
@@ -59,15 +59,15 @@ newtype instance ClassFlags Parse = ClassFlags (Flags ClassFlag)
   deriving Extractable via Generically (ClassFlags Parse)
 
 data ClassFlag
-  = Public
-  | Final
-  | Super
-  | Interface
-  | Abstract
-  | Synthetic
-  | Annotation
-  | Enum
-  | Module
+  = Public -- may be accessed from outside the package
+  | Final -- no subclasses allowed
+  | Super -- treat superclass methods special when using InvokeSpecial
+  | Interface -- is an interface
+  | Abstract -- abstract, must not be instantiated
+  | Synthetic -- not present in source code
+  | Annotation -- is annotation interface
+  | Enum -- enumerated instances
+  | Module -- module, not a class
   deriving (Show, Eq, Ord, Enum, Bounded)
 
 instance FlagMask ClassFlag where