diff --git a/src/proto_alpha/lib_protocol/alpha_context.mli b/src/proto_alpha/lib_protocol/alpha_context.mli
index 3509c29afeb653dd8ce9cbe70103851805174f62..2202f1272718b3735057aaf4bec161eeb93e77b8 100644
--- a/src/proto_alpha/lib_protocol/alpha_context.mli
+++ b/src/proto_alpha/lib_protocol/alpha_context.mli
@@ -3659,6 +3659,10 @@ module Sc_rollup : sig
   module Wasm_2_0_0PVM : sig
     val ticks_per_snapshot : Z.t
 
+    val well_known_reveal_preimage : string
+
+    val well_known_reveal_hash : Sc_rollup_reveal_hash.t
+
     module type P = sig
       module Tree :
         Context.TREE with type key = string list and type value = bytes
diff --git a/src/proto_alpha/lib_protocol/sc_rollup_wasm.ml b/src/proto_alpha/lib_protocol/sc_rollup_wasm.ml
index 30ed9608c2a021209f0d10d219f059b2ea9231c1..f4876f2c3852cbbd1ea318029c5862c5ea2576e1 100644
--- a/src/proto_alpha/lib_protocol/sc_rollup_wasm.ml
+++ b/src/proto_alpha/lib_protocol/sc_rollup_wasm.ml
@@ -83,6 +83,13 @@ let () =
 module V2_0_0 = struct
   let ticks_per_snapshot = Z.of_int64 11_000_000_000L
 
+  let well_known_reveal_preimage = ""
+
+  let well_known_reveal_hash =
+    Sc_rollup_reveal_hash.hash_string
+      ~scheme:Blake2B
+      [well_known_reveal_preimage]
+
   (*
     This is the state hash of reference that both the prover of the
     node and the verifier of the protocol {!Protocol_implementation}
@@ -303,10 +310,7 @@ module V2_0_0 = struct
           | None ->
               (* In case of an invalid hash, the rollup is
                  blocked. Any commitment will be invalid. *)
-              Waiting_for_reveal
-                (Reveal_raw_data
-                   (Sc_rollup_reveal_hash.zero
-                      ~scheme:Sc_rollup_reveal_hash.Blake2B)))
+              Waiting_for_reveal (Reveal_raw_data well_known_reveal_hash))
       | Reveal_required Wasm_2_0_0.Reveal_metadata ->
           Waiting_for_reveal Reveal_metadata
 
diff --git a/src/proto_alpha/lib_protocol/sc_rollup_wasm.mli b/src/proto_alpha/lib_protocol/sc_rollup_wasm.mli
index 35f7ef51753efd072dc4d7eb4fa6d42169306676..6d6ce03abab121bcf37f0930a49212b5f4cd7f6d 100644
--- a/src/proto_alpha/lib_protocol/sc_rollup_wasm.mli
+++ b/src/proto_alpha/lib_protocol/sc_rollup_wasm.mli
@@ -124,4 +124,12 @@ module V2_0_0 : sig
 
       see #3590 for more pointers *)
   val ticks_per_snapshot : Z.t
+
+  (** The hash requested by the WASM PVM if it cannot decode the input
+      provided by the WASM kernel, that is, if the bytes value cannot
+      be decoded with {!Sc_rollup_reveal_hash.encoding}. *)
+  val well_known_reveal_hash : Sc_rollup_reveal_hash.t
+
+  (** The preimage of {!well_known_reveal_hash}. *)
+  val well_known_reveal_preimage : string
 end