diff --git a/sizzle.js b/sizzle.js
index aa002867..ac01c043 100644
--- a/sizzle.js
+++ b/sizzle.js
@@ -1373,11 +1373,16 @@ if ( document.querySelectorAll ) {
 			oldSelect = select,
 			rescape = /'|\\/g,
 			rattributeQuotes = /\=[\x20\t\r\n\f]*([^'"\]]*)[\x20\t\r\n\f]*\]/g,
-			rbuggyQSA = [],
+
+			// qSa(:focus) reports false when true (Chrome 21),
+			// A support test would require too much code (would include document ready)
+			rbuggyQSA = [":focus"],
+
+			// matchesSelector(:focus) reports false when true (Chrome 21),
 			// matchesSelector(:active) reports false when true (IE9/Opera 11.5)
 			// A support test would require too much code (would include document ready)
 			// just skip matchesSelector for :active
-			rbuggyMatches = [":active"],
+			rbuggyMatches = [ ":active", ":focus" ],
 			matches = docElem.matchesSelector ||
 				docElem.mozMatchesSelector ||
 				docElem.webkitMatchesSelector ||
@@ -1424,7 +1429,8 @@ if ( document.querySelectorAll ) {
 			}
 		});
 
-		rbuggyQSA = rbuggyQSA.length && new RegExp( rbuggyQSA.join("|") );
+		// rbuggyQSA always contains :focus, so no need for a length check
+		rbuggyQSA = /* rbuggyQSA.length && */ new RegExp( rbuggyQSA.join("|") );
 
 		select = function( selector, context, results, seed, xml ) {
 			// Only use querySelectorAll when not filtering,
@@ -1490,7 +1496,7 @@ if ( document.querySelectorAll ) {
 				} catch ( e ) {}
 			});
 
-			// rbuggyMatches always contains :active, so no need for a length check
+			// rbuggyMatches always contains :active and :focus, so no need for a length check
 			rbuggyMatches = /* rbuggyMatches.length && */ new RegExp( rbuggyMatches.join("|") );
 
 			Sizzle.matchesSelector = function( elem, expr ) {