diff --git a/src/doc/rustc-dev-guide/src/borrow_check/region_inference/lifetime_parameters.md b/src/doc/rustc-dev-guide/src/borrow_check/region_inference/lifetime_parameters.md
index 1a50f45f9fda..798af13378a3 100644
--- a/src/doc/rustc-dev-guide/src/borrow_check/region_inference/lifetime_parameters.md
+++ b/src/doc/rustc-dev-guide/src/borrow_check/region_inference/lifetime_parameters.md
@@ -103,7 +103,7 @@ rise to an outlives constraint `'a: 'b`. Combined with our default liveness
 constraints we get:
 
 ```
-'a live at {B, end('a)} // B represents the "bunction body"
+'a live at {B, end('a)} // B represents the "function body"
 'b live at {B, end('b)}
 'a: 'b
 ```