diff --git a/compiler/rustc_middle/src/ty/mod.rs b/compiler/rustc_middle/src/ty/mod.rs
index 7681041863e9a..babab005edb2b 100644
--- a/compiler/rustc_middle/src/ty/mod.rs
+++ b/compiler/rustc_middle/src/ty/mod.rs
@@ -675,6 +675,8 @@ pub struct CapturedPlace<'tcx> {
 }
 
 impl CapturedPlace<'tcx> {
+    /// Returns the hir-id of the root variable for the captured place.
+    /// e.g., if `a.b.c` was captured, would return the hir-id for `a`.
     pub fn get_root_variable(&self) -> hir::HirId {
         match self.place.base {
             HirPlaceBase::Upvar(upvar_id) => upvar_id.var_path.hir_id,
diff --git a/compiler/rustc_mir/src/borrow_check/mod.rs b/compiler/rustc_mir/src/borrow_check/mod.rs
index c42e271f40e45..5db52db70ac68 100644
--- a/compiler/rustc_mir/src/borrow_check/mod.rs
+++ b/compiler/rustc_mir/src/borrow_check/mod.rs
@@ -1358,10 +1358,10 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
 
     fn propagate_closure_used_mut_upvar(&mut self, operand: &Operand<'tcx>) {
         let propagate_closure_used_mut_place = |this: &mut Self, place: Place<'tcx>| {
-            // We have three possiblities here:
+            // We have three possibilities here:
             // a. We are modifying something through a mut-ref
             // b. We are modifying something that is local to our parent
-            // c. Current body is a nested clsoure, and we are modifying path starting from
+            // c. Current body is a nested closure, and we are modifying path starting from
             //    a Place captured by our parent closure.
 
             // Handle (c), the path being modified is exactly the path captured by our parent