diff --git a/simulator/runner/cli.rs b/simulator/runner/cli.rs
index 36f74abc3..3bfae4349 100644
--- a/simulator/runner/cli.rs
+++ b/simulator/runner/cli.rs
@@ -127,8 +127,8 @@ pub struct SimulatorCLI {
     pub max_tick: u64,
     #[clap(long, help = "Enable experimental MVCC feature")]
     pub experimental_mvcc: bool,
-    #[clap(long, help = "Enable experimental indexing feature")]
-    pub experimental_indexes: bool,
+    #[clap(long, help = "Disable experimental indexing feature")]
+    pub disable_experimental_indexes: bool,
 }
 
 #[derive(Parser, Debug, Clone, Serialize, Deserialize, PartialEq, PartialOrd, Eq, Ord)]
diff --git a/simulator/runner/env.rs b/simulator/runner/env.rs
index fa5859af3..83e965da7 100644
--- a/simulator/runner/env.rs
+++ b/simulator/runner/env.rs
@@ -246,7 +246,7 @@ impl SimulatorEnv {
             disable_reopen_database: cli_opts.disable_reopen_database,
             latency_probability: cli_opts.latency_probability,
             experimental_mvcc: cli_opts.experimental_mvcc,
-            experimental_indexes: cli_opts.experimental_indexes,
+            experimental_indexes: !cli_opts.disable_experimental_indexes,
             min_tick: cli_opts.min_tick,
             max_tick: cli_opts.max_tick,
         };