diff --git a/tss-esapi/examples/hmac.rs b/tss-esapi/examples/hmac.rs
index 1c6c5ee8..10f4988a 100644
--- a/tss-esapi/examples/hmac.rs
+++ b/tss-esapi/examples/hmac.rs
@@ -27,7 +27,7 @@ fn main() {
     // tpm resource manager.
     let mut context = Context::new(
         TctiNameConf::from_environment_variable()
-            .expect("Failed to get TCTI / TPM2TOOLS_TCTI from environment"),
+            .expect("Failed to get TCTI / TPM2TOOLS_TCTI from environment. Try `export TCTI=device:/dev/tpmrm0`"),
     )
     .expect("Failed to create Context");
 
@@ -138,7 +138,7 @@ fn main() {
                 .unwrap();
             // Perform the HMAC.
             let r = ctx.hmac(
-                hmac_key.clone().into(),
+                hmac_key.into(),
                 input_data.clone(),
                 HashingAlgorithm::Sha256,
             );