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-rw-r--r--src/tools/miri/CONTRIBUTING.md3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/tools/miri/CONTRIBUTING.md b/src/tools/miri/CONTRIBUTING.md
index b1e6b9c69d3..a2c86c3a8b2 100644
--- a/src/tools/miri/CONTRIBUTING.md
+++ b/src/tools/miri/CONTRIBUTING.md
@@ -138,6 +138,9 @@ There's a test for the cargo wrapper in the `test-cargo-miri` directory; run
 `./run-test.py` in there to execute it. Like `./miri test`, this respects the
 `MIRI_TEST_TARGET` environment variable to execute the test for another target.
 
+Note that installing Miri like this will "take away" Miri management from `rustup`.
+If you want to later go back to a rustup-installed Miri, run `rustup update`.
+
 ### Using a modified standard library
 
 Miri re-builds the standard library into a custom sysroot, so it is fairly easy