1 files changed, 0 insertions, 3 deletions
diff --git a/lib/iStream.mli b/lib/iStream.mli
index 67e5e0764f..a059570107 100644
--- a/lib/iStream.mli
+++ b/lib/iStream.mli
@@ -42,9 +42,6 @@ val is_empty : 'a t -> bool
 val peek : 'a t -> ('a , 'a t) u
 (** Return the head and the tail of a stream, if any. *)
 
-val is_val : 'a t -> bool
-(** Check if the head has already been evaluated. *)
-
 (** {6 Standard operations}
 
     All stream-returning functions are lazy. The other ones are eager. *)