diff --git a/lib/parser.dart b/lib/parser.dart
index a1a9823..6b05c85 100644
--- a/lib/parser.dart
+++ b/lib/parser.dart
@@ -2447,8 +2447,15 @@
    * then parse to the right paren ignoring everything in between.
    */
   processIEFilter(FileSpan startAfterProgidColon) {
-    var parens = 0;
+    // Support non-functional filters (i.e. filter: FlipH)
+    var kind = _peek();
+    if (kind == TokenKind.SEMICOLON || kind == TokenKind.RBRACE) {
+      var tok = tokenizer.makeIEFilter(
+          startAfterProgidColon.start.offset, _peekToken.start);
+      return new LiteralTerm(tok.text, tok.text, tok.span);
+    }
 
+    var parens = 0;
     while (_peek() != TokenKind.END_OF_FILE) {
       switch (_peek()) {
         case TokenKind.LPAREN:
diff --git a/pubspec.yaml b/pubspec.yaml
index 81c97a8..8ed29b6 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: csslib
-version: 0.13.5
+version: 0.13.6
 author: Dart Team <misc@dartlang.org>
 description: A library for parsing CSS.
 homepage: https://github.com/dart-lang/csslib
diff --git a/test/declaration_test.dart b/test/declaration_test.dart
index ba12344..007916d 100644
--- a/test/declaration_test.dart
+++ b/test/declaration_test.dart
@@ -781,6 +781,17 @@
   expect(stylesheet != null, true);
   expect(errors.isEmpty, true, reason: errors.toString());
   expect(prettyPrint(stylesheet), generated3);
+
+  final input4 = '''
+div {
+  filter: FlipH;
+}''';
+
+  stylesheet = parseCss(input4, errors: errors..clear(), opts: simpleOptions);
+
+  expect(stylesheet != null, true);
+  expect(errors.isEmpty, true, reason: errors.toString());
+  expect(prettyPrint(stylesheet), input4);
 }
 
 /**