diff --git a/CHANGELOG b/CHANGELOG
index 2b2addb..cd2983d 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,5 @@
+* Allow Selector to correctly detect the presence of namespaced attributes. Closes #10987. [Samuel Lebeau, Tobie Langel]
+
 * Make Element#absolutize and Element#relativize always return element. Closes #10983. [kangax]
 
 * Add deprecation extension. [Tobie Langel]
diff --git a/src/selector.js b/src/selector.js
index e679356..05789f7 100644
--- a/src/selector.js
+++ b/src/selector.js
@@ -273,7 +273,7 @@ Object.extend(Selector, {
     className:    /^\.([\w\-\*]+)(\b|$)/,
     pseudo:      
 /^:((first|last|nth|nth-last|only)(-child|-of-type)|empty|checked|(en|dis)abled|not)(\((.*?)\))?(\b|$|(?=\s|[:+~>]))/,
-    attrPresence: /^\[([\w]+)\]/,
+    attrPresence: /^\[((?:[\w]+:)?[\w]+)\]/,
     attr:         /\[((?:[\w-]*:)?[\w-]+)\s*(?:([!^$*~|]?=)\s*((['"])([^\4]*?)\4|([^'"][^\]]*?)))?\]/
   },
   
diff --git a/test/unit/selector.html b/test/unit/selector.html
index bf85d81..2392fc7 100644
--- a/test/unit/selector.html
+++ b/test/unit/selector.html
@@ -268,6 +268,9 @@
         assertUndefined(new Selector('body p[xml:lang]').xpath);
       } else
         info("Could not test XPath bypass: no XPath to begin with!");
+      
+      assertElementsMatch($$('[xml:lang]'), 'html', '#item_3');
+      assertElementsMatch($$('*[xml:lang]'), 'html', '#item_3');
     }},
 
     testSelectorWithChild: function() { with(this) {