diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4a89bab3..829f17c8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 1.17.3
+
+* Don't put style rules inside empty `@keyframes` selectors.
+
 ## 1.17.2
 
 * Deprecate `!global` variable assignments to variables that aren't yet defined.
diff --git a/lib/src/visitor/async_evaluate.dart b/lib/src/visitor/async_evaluate.dart
index 9fdd4d20..767a12b7 100644
--- a/lib/src/visitor/async_evaluate.dart
+++ b/lib/src/visitor/async_evaluate.dart
@@ -666,7 +666,7 @@ class _EvaluateVisitor
 
     await _withParent(ModifiableCssAtRule(name, node.span, value: value),
         () async {
-      if (!_inStyleRule) {
+      if (!_inStyleRule || _inKeyframes) {
         for (var child in node.children) {
           await child.accept(this);
         }
diff --git a/lib/src/visitor/evaluate.dart b/lib/src/visitor/evaluate.dart
index c6f74808..b1e18b47 100644
--- a/lib/src/visitor/evaluate.dart
+++ b/lib/src/visitor/evaluate.dart
@@ -5,7 +5,7 @@
 // DO NOT EDIT. This file was generated from async_evaluate.dart.
 // See tool/synchronize.dart for details.
 //
-// Checksum: 607d30ac9d49b341367f71b69bed09f19f93e77d
+// Checksum: ffaa86c905bb6ef4bcb3d5a0c4ddf7b9af5d4d55
 //
 // ignore_for_file: unused_import
 
@@ -668,7 +668,7 @@ class _EvaluateVisitor
     }
 
     _withParent(ModifiableCssAtRule(name, node.span, value: value), () {
-      if (!_inStyleRule) {
+      if (!_inStyleRule || _inKeyframes) {
         for (var child in node.children) {
           child.accept(this);
         }
diff --git a/pubspec.yaml b/pubspec.yaml
index 8b5fa2c6..c0d4cc5c 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: sass
-version: 1.17.2
+version: 1.17.3-dev
 description: A Sass implementation in Dart.
 author: Dart Team <misc@dartlang.org>
 homepage: https://github.com/sass/dart-sass