diff --git a/README.rst b/README.rst
index f1c0cad..8120259 100644
--- a/README.rst
+++ b/README.rst
@@ -163,7 +163,7 @@ To build the litex example, run the following commands:
         wget https://static.dev.sifive.com/dev-tools/riscv64-unknown-elf-gcc-8.1.0-2019.01.0-x86_64-linux-ubuntu14.tar.gz
         tar -xf riscv64-unknown-elf-gcc-8.1.0-2019.01.0-x86_64-linux-ubuntu14.tar.gz
         export PATH=$PATH:$PWD/riscv64-unknown-elf-gcc-8.1.0-2019.01.0-x86_64-linux-ubuntu14/bin/
-        pushd litex/litex/boards/targets && ./arty.py --toolchain symbiflow --cpu-type vexriscv --build && popd
+        pushd litex/litex/boards/targets && ./arty.py --toolchain symbiflow --cpu-type vexriscv --sys-clk-freq 80e6 --no-ident-version --build && popd
 
 To build the linux-litex-demo example, run the following commands: