diff --git a/src/tools/miri/rust-version b/src/tools/miri/rust-version
index d3840775da96..aa06a0dbcdc5 100644
--- a/src/tools/miri/rust-version
+++ b/src/tools/miri/rust-version
@@ -1 +1 @@
-78dd504f2fd87c0cfabff7d9174253411caf2f80
+21e6de7eb64c09102de3f100420a09edc1a2a8d7