diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index f6147bbbe53..42f77b5cbc0 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -169,14 +169,14 @@ to `.vscode/settings.json` in your local Miri clone:
     ],
     "rust-analyzer.checkOnSave.overrideCommand": [
         "env",
-        "AUTO_OPS=42",
+        "MIRI_AUTO_OPS=no",
         "./miri",
         "check",
         "--message-format=json"
     ],
     "rust-analyzer.buildScripts.overrideCommand": [
         "env",
-        "AUTO_OPS=42",
+        "MIRI_AUTO_OPS=no",
         "./miri",
         "check",
         "--message-format=json",
diff --git a/miri b/miri
index 38f8e546aec..463e4607bae 100755
--- a/miri
+++ b/miri
@@ -53,8 +53,8 @@ EOF
 MIRIDIR=$(python3 -c 'import os, sys; print(os.path.dirname(os.path.realpath(sys.argv[1])))' "$0")
 
 ## Run the auto-things.
-if [ -z "$AUTO_OPS" ]; then
-    export AUTO_OPS=42
+if [ -z "$MIRI_AUTO_OPS" ]; then
+    export MIRI_AUTO_OPS=42
 
     # Run this first, so that the toolchain doesn't change after
     # other code has run.