diff --git a/benchmarks/README.md b/benchmarks/README.md
index a63761b6c2b3..b42eb975f1e6 100644
--- a/benchmarks/README.md
+++ b/benchmarks/README.md
@@ -47,7 +47,7 @@ The benchmark can then be run (assuming the data created from `dbgen` is in `./d
 cargo run --release --bin tpch -- benchmark datafusion --iterations 3 --path ./data --format tbl --query 1 --batch-size 4096
 ```
 
-You can enable the features `simd` (to use SIMD instructions) and/or `mimalloc` or `snmalloc` (to use either the mimalloc or snmalloc allocator) as features by passing them in as `--features`:
+You can enable the features `simd` (to use SIMD instructions, `cargo nightly` is required.) and/or `mimalloc` or `snmalloc` (to use either the mimalloc or snmalloc allocator) as features by passing them in as `--features`:
 
 ```
 cargo run --release --features "simd mimalloc" --bin tpch -- benchmark datafusion --iterations 3 --path ./data --format tbl --query 1 --batch-size 4096
@@ -113,7 +113,7 @@ RUST_LOG=info cargo run --release
 
 By default the executor will bind to `0.0.0.0` and listen on port 50051.
 
-You can add SIMD/snmalloc/LTO flags to improve speed (with longer build times):
+You can add SIMD(`cargo nightly` is required)/snmalloc/LTO flags to improve speed (with longer build times):
 
 ```
 RUST_LOG=info RUSTFLAGS='-C target-cpu=native -C lto -C codegen-units=1 -C embed-bitcode' cargo run --release --bin executor --features "simd snmalloc" --target x86_64-unknown-linux-gnu