diff --git a/src/vnet/l2/l2_input.h b/src/vnet/l2/l2_input.h
index 57fca57..4a5cf6c 100644
--- a/src/vnet/l2/l2_input.h
+++ b/src/vnet/l2/l2_input.h
@@ -152,7 +152,7 @@
 /** Return an array of strings containing graph node names of each feature */
 char **l2input_get_feat_names (void);
 
-/* arg0 - u32 feature_bitmap */
+/* arg0 - u32 feature_bitmap, arg1 - u32 verbose */
 u8 *format_l2_input_features (u8 * s, va_list * args);
 
 static_always_inline u8