diff --git a/Readme.md b/Readme.md
index 758fb3b..a191139 100644
--- a/Readme.md
+++ b/Readme.md
@@ -62,7 +62,7 @@ sudo make install
 # build 64bit
 sudo make clean
 # ./configure --prefix=/opt/riscv 
-./configure --prefix=/opt/riscv64 --with-arch=rv64imc_zicsr --with-abi=lp64
+./configure --prefix=/opt/riscv --with-arch=rv64imc_zicsr --with-abi=lp64
 sudo make -j12
 
 # build 32bit