diff --git a/README.md b/README.md
index d21907bd..108dac6e 100644
--- a/README.md
+++ b/README.md
@@ -24,6 +24,8 @@ cargo run --example llama --release
 cargo run --example falcon --release
 ```
 
+In order to use **CUDA** add `--features cuda` to the example command line.
+
 
 ## Features
 
diff --git a/candle-core/src/dummy_cuda_backend.rs b/candle-core/src/dummy_cuda_backend.rs
index a81dda57..a9c11bf6 100644
--- a/candle-core/src/dummy_cuda_backend.rs
+++ b/candle-core/src/dummy_cuda_backend.rs
@@ -9,7 +9,7 @@ pub struct CudaStorage;
 
 macro_rules! fail {
     () => {
-        unimplemented!("cuda support has not been enabled")
+        unimplemented!("cuda support has not been enabled, add `cuda` feature to enable.")
     };
 }