diff --git a/src/utils/crypto_box.ml b/src/utils/crypto_box.ml
index 5acd2fcd1..237d068a5 100644
--- a/src/utils/crypto_box.ml
+++ b/src/utils/crypto_box.ml
@@ -37,7 +37,7 @@ let compare_target hash target =
   let rec check offset = function
     | [] -> true
     | x :: xs ->
-        Compare.Uint64.(EndianString.BigEndian.get_int64 hash offset < x)
+        Compare.Uint64.(EndianString.BigEndian.get_int64 hash offset <= x)
         && check (offset + 8) xs in
   check 0 target