diff --git a/crates/ra_mbe/src/lib.rs b/crates/ra_mbe/src/lib.rs
index b098378314..87782e5b91 100644
--- a/crates/ra_mbe/src/lib.rs
+++ b/crates/ra_mbe/src/lib.rs
@@ -26,7 +26,7 @@ pub use tt::{Delimiter, Punct};
 
 pub use crate::syntax_bridge::ast_to_token_tree;
 
-/// This struct contains AST for a single `macro_rules` defenition. What might
+/// This struct contains AST for a single `macro_rules` definition. What might
 /// be very confusing is that AST has almost exactly the same shape as
 /// `tt::TokenTree`, but there's a crucial difference: in macro rules, `$ident`
 /// and `$()*` have special meaning (see `Var` and `Repeat` data structures)
diff --git a/crates/ra_mbe/src/mbe_expander.rs b/crates/ra_mbe/src/mbe_expander.rs
index 31531f4c9e..eec713d9c1 100644
--- a/crates/ra_mbe/src/mbe_expander.rs
+++ b/crates/ra_mbe/src/mbe_expander.rs
@@ -1,4 +1,4 @@
-/// This module takes a (parsed) defenition of `macro_rules` invocation, a
+/// This module takes a (parsed) definition of `macro_rules` invocation, a
 /// `tt::TokenTree` representing an argument of macro invocation, and produces a
 /// `tt::TokenTree` for the result of the expansion.
 use rustc_hash::FxHashMap;