diff --git a/src/librustdoc/clean/mod.rs b/src/librustdoc/clean/mod.rs
index 89977934cde..abd0b3562d2 100644
--- a/src/librustdoc/clean/mod.rs
+++ b/src/librustdoc/clean/mod.rs
@@ -1840,7 +1840,9 @@ fn maybe_expand_private_type_alias<'tcx>(
         }
     }
 
-    Some(cx.enter_alias(args, def_id.to_def_id(), |cx| clean_ty(&ty, cx)))
+    Some(cx.enter_alias(args, def_id.to_def_id(), |cx| {
+        cx.with_param_env(def_id.to_def_id(), |cx| clean_ty(&ty, cx))
+    }))
 }
 
 pub(crate) fn clean_ty<'tcx>(ty: &hir::Ty<'tcx>, cx: &mut DocContext<'tcx>) -> Type {
diff --git a/tests/rustdoc-ui/normalize-in-inlined-type-alias.rs b/tests/rustdoc-ui/normalize-in-inlined-type-alias.rs
new file mode 100644
index 00000000000..45e04a70c09
--- /dev/null
+++ b/tests/rustdoc-ui/normalize-in-inlined-type-alias.rs
@@ -0,0 +1,14 @@
+// check-pass
+// compile-flags: -Znormalize-docs
+
+trait Woo<T> {
+    type Assoc;
+}
+
+impl<T> Woo<T> for () {
+    type Assoc = ();
+}
+
+type Alias<P> = <() as Woo<P>>::Assoc;
+
+pub fn hello<S>() -> Alias<S> {}