diff --git a/README.md b/README.md
index 40a9bfaea..7f3478c0d 100644
--- a/README.md
+++ b/README.md
@@ -178,6 +178,8 @@ Sass to update the reference behavior.
 
 13. The reference combinator is not supported. See [issue 303][].
 
+14. Universal selector unification is symmetrical. See [issue 2247][].
+
 [issue 1599]: https://github.com/sass/sass/issues/1599
 [issue 1126]: https://github.com/sass/sass/issues/1126
 [issue 2120]: https://github.com/sass/sass/issues/2120
@@ -191,5 +193,6 @@ Sass to update the reference behavior.
 [issue 2228]: https://github.com/sass/sass/issues/2228
 [issue 2245]: https://github.com/sass/sass/issues/2245
 [issue 303]: https://github.com/sass/sass/issues/303
+[issue 2247]: https://github.com/sass/sass/issues/2247
 
 Disclaimer: this is not an official Google product.
diff --git a/lib/src/ast/selector/pseudo.dart b/lib/src/ast/selector/pseudo.dart
index 4bccbe18a..2bded677e 100644
--- a/lib/src/ast/selector/pseudo.dart
+++ b/lib/src/ast/selector/pseudo.dart
@@ -84,6 +84,9 @@ class PseudoSelector extends SimpleSelector {
   }
 
   List<SimpleSelector> unify(List<SimpleSelector> compound) {
+    if (compound.length == 1 && compound.first is UniversalSelector) {
+      return compound.first.unify([this]);
+    }
     if (compound.contains(this)) return compound;
 
     var result = <SimpleSelector>[];
diff --git a/lib/src/ast/selector/simple.dart b/lib/src/ast/selector/simple.dart
index 25dfb9930..22d31dfb1 100644
--- a/lib/src/ast/selector/simple.dart
+++ b/lib/src/ast/selector/simple.dart
@@ -56,6 +56,9 @@ abstract class SimpleSelector extends Selector {
   /// Returns `null` if unification is impossible—for example, if there are
   /// multiple ID selectors.
   List<SimpleSelector> unify(List<SimpleSelector> compound) {
+    if (compound.length == 1 && compound.first is UniversalSelector) {
+      return compound.first.unify([this]);
+    }
     if (compound.contains(this)) return compound;
 
     var result = <SimpleSelector>[];