diff --git a/src/proto_alpha/lib_protocol/operation_repr.ml b/src/proto_alpha/lib_protocol/operation_repr.ml
index 020ffe01b888c2a28e3e739797cf3c215de6b1b0..50a9d86e20fecb9346eca6064a30680ee30e37ef 100644
--- a/src/proto_alpha/lib_protocol/operation_repr.ml
+++ b/src/proto_alpha/lib_protocol/operation_repr.ml
@@ -1091,7 +1091,7 @@ module Encoding = struct
           name = "sc_rollup_originate";
           encoding =
             obj4
-              (req "kind" Sc_rollups.Kind.encoding)
+              (req "pvm_kind" Sc_rollups.Kind.encoding)
               (req "boot_sector" string_to_bytes_encoding)
               (req "origination_proof" string_to_bytes_encoding)
               (req "parameters_ty" Script_repr.lazy_expr_encoding);