From 0859397f21457d42635d8c638558ed503ff65fa0 Mon Sep 17 00:00:00 2001
From: SChernykh <15806605+SChernykh@users.noreply.github.com>
Date: Mon, 8 Jun 2026 19:35:10 +0200
Subject: [PATCH] Miner: fixed thread 0 always mining with secure JIT (worse
 performance)

---
 src/cryptonote_basic/miner.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/cryptonote_basic/miner.cpp b/src/cryptonote_basic/miner.cpp
index 71b8f78cc..fd13ff74d 100644
--- a/src/cryptonote_basic/miner.cpp
+++ b/src/cryptonote_basic/miner.cpp
@@ -578,7 +578,8 @@ namespace cryptonote
 
       if ((b.major_version >= RX_BLOCK_VERSION) && !rx_set)
       {
-        crypto::rx_set_miner_thread(th_local_index, tools::get_max_concurrency());
+        // Must be non-zero value because 0 means "not a miner thread, run with secure JIT" in rx-slow-hash.c
+        crypto::rx_set_miner_thread(th_local_index + 1, tools::get_max_concurrency());
         rx_set = true;
       }