diff --git a/toolchains/esp-tools/riscv-isa-sim b/toolchains/esp-tools/riscv-isa-sim
index 2bc65d1b..a1ff6b03 160000
--- a/toolchains/esp-tools/riscv-isa-sim
+++ b/toolchains/esp-tools/riscv-isa-sim
@@ -1 +1 @@
-Subproject commit 2bc65d1bf6605077e3740941c086724beb35db05
+Subproject commit a1ff6b03f7f630a06327798238256973568e3837