Modify mutable deref rule for `&mut T`
diff --git a/src/expressions.md b/src/expressions.md
index 8827c95..e63e022 100644
--- a/src/expressions.md
+++ b/src/expressions.md
@@ -241,7 +241,7 @@
* [Temporary values].
* [Fields][field]: this evaluates the subexpression in a mutable place expression context.
* [Dereferences][deref] of a `*mut T` pointer.
-* Dereference of a variable, or field of a variable, with type `&mut T`.
+* Dereference of a movable place, with type `&mut T`. This includes variables and their fields, as well as temporaries.
Note: This is an exception to the requirement of the next rule.
* Dereferences of a type that implements `DerefMut`:
this then requires that the value being dereferenced is evaluated in a mutable place expression context.
