diff --git a/component-model/examples/tutorial/adder/src/lib.rs b/component-model/examples/tutorial/adder/src/lib.rs
index ec5d396d..3c5713cc 100644
--- a/component-model/examples/tutorial/adder/src/lib.rs
+++ b/component-model/examples/tutorial/adder/src/lib.rs
@@ -7,7 +7,7 @@ struct Component;
 
 impl Guest for Component {
     fn add(x: u32, y: u32) -> u32 {
-        a + b
+        x + y
     }
 }
 
diff --git a/component-model/src/language-support/rust.md b/component-model/src/language-support/rust.md
index f03e531b..13e512b4 100644
--- a/component-model/src/language-support/rust.md
+++ b/component-model/src/language-support/rust.md
@@ -148,7 +148,7 @@ struct Component;
 
 impl Guest for Component {
     fn add(x: u32, y: u32) -> u32 {
-        a + b
+        x + y
     }
 }
 ```