diff --git a/compiler/rustc_passes/src/check_attr.rs b/compiler/rustc_passes/src/check_attr.rs
index 633a90dd0ec7..09d883aad05d 100644
--- a/compiler/rustc_passes/src/check_attr.rs
+++ b/compiler/rustc_passes/src/check_attr.rs
@@ -1062,7 +1062,7 @@ impl CheckAttrVisitor<'tcx> {
                     lint.build(
                         "`must_use` attribute on `async` functions \
                               applies to the anonymous `Future` returned by the \
-                              function, not the value within.",
+                              function, not the value within",
                     )
                     .span_label(
                         *span,
diff --git a/src/test/ui/lint/unused/unused-async.stderr b/src/test/ui/lint/unused/unused-async.stderr
index e470b6dac947..6bbc9e2bf008 100644
--- a/src/test/ui/lint/unused/unused-async.stderr
+++ b/src/test/ui/lint/unused/unused-async.stderr
@@ -1,4 +1,4 @@
-warning: `must_use` attribute on `async` functions applies to the anonymous `Future` returned by the function, not the value within.
+warning: `must_use` attribute on `async` functions applies to the anonymous `Future` returned by the function, not the value within
   --> $DIR/unused-async.rs:5:1
    |
 LL |   #[must_use]
@@ -11,7 +11,7 @@ LL | | }
    |
    = note: `#[warn(unused_attributes)]` on by default
 
-warning: `must_use` attribute on `async` functions applies to the anonymous `Future` returned by the function, not the value within.
+warning: `must_use` attribute on `async` functions applies to the anonymous `Future` returned by the function, not the value within
   --> $DIR/unused-async.rs:15:5
    |
 LL |       #[must_use]