diff --git a/kernel/rtlil.h b/kernel/rtlil.h
index eaaae814d..136cf9a13 100644
--- a/kernel/rtlil.h
+++ b/kernel/rtlil.h
@@ -53,15 +53,9 @@ namespace RTLIL
 		CONST_FLAG_NONE   = 0,
 		CONST_FLAG_STRING = 1,
 		CONST_FLAG_SIGNED = 2,  // only used for parameters
-		CONST_FLAG_REAL   = 4,  // only used for parameters
+		CONST_FLAG_REAL   = 4   // only used for parameters
 	};
 
-	// // Union discriminator. Values are exclusive
-	// enum ConstRepr : unsigned char {
-	// 	CONST_REPR_BITS   = 1,
-	// 	CONST_REPR_STRING = 2,
-	// };
-
 	struct Const;
 	struct AttrObject;
 	struct Selection;