diff --git a/prefixfree.js b/prefixfree.js
index 2e5685f7..f9bc1384 100755
--- a/prefixfree.js
+++ b/prefixfree.js
@@ -461,6 +461,7 @@ for (var keyword in keywords) {
 
 var
 selectors = {
+	':any': ':is',
 	':any-link': null,
 	'::backdrop': null,
 	':fullscreen': null,
@@ -493,10 +494,12 @@ function supported(selector) {
 	return !!style.sheet.cssRules.length;
 }
 
+var prefixed;
 for(var selector in selectors) {
 	var standard = selectors[selector] || selector
-	var prefixed = selector.replace(/::?/, function($0) { return $0 + self.prefix })
-	if(!supported(standard) && supported(prefixed)) {
+	prefixed = selector.replace(/::?/, function($0) { return $0 + self.prefix });
+	if((!supported(standard) && !supported(standard + '(a,p)')) && 
+	   (supported(prefixed) || supported(prefixed + '(a,p)') )) {
 		self.selectors.push(standard);
 		self.selectorMap[standard] = prefixed;
 	}