diff --git a/README.md b/README.md
index 6d275481..e91a6c5a 100644
--- a/README.md
+++ b/README.md
@@ -123,7 +123,7 @@ such variables to you ~/.bashrc file or equivalent.
 ```bash
 # SystemC home and target architecture
 export SYSTEMC_HOME=<path>
-export SYSTEMC_TARGET_ARCH=<[linux,linux64]>
+export SYSTEMC_TARGET_ARCH=<[linux, linux64, macosx, macosx64, ...]>
 
 # DRAMSys libraries and headers
 export PYTHON_HOME=<path>