diff --git a/README.md b/README.md
index cbf1c4158..3e4f510e0 100644
--- a/README.md
+++ b/README.md
@@ -154,7 +154,7 @@ pip install llama-cpp-python \
 To install with Metal (MPS), set the `GGML_METAL=on` environment variable before installing:
 
 ```bash
-CMAKE_ARGS="-DGGML_METAL=on" pip install llama-cpp-python
+CMAKE_ARGS="-DGGML_METAL=1" pip install llama-cpp-python
 ```
 
 **Pre-built Wheel (New)**