diff --git a/toolchains/riscv-tools/riscv-isa-sim b/toolchains/riscv-tools/riscv-isa-sim
index 5a499ef7..4d8651be 160000
--- a/toolchains/riscv-tools/riscv-isa-sim
+++ b/toolchains/riscv-tools/riscv-isa-sim
@@ -1 +1 @@
-Subproject commit 5a499ef718bba2fc323e9771ebd7545c66825ff6
+Subproject commit 4d8651be943ea706eb8dcb3443add2e7ccc117a6