diff --git a/src/Property/Selector.php b/src/Property/Selector.php
index 70c9b2fd..475e8d46 100644
--- a/src/Property/Selector.php
+++ b/src/Property/Selector.php
@@ -107,6 +107,7 @@ public function getSelector()
      */
     public function setSelector($sSelector)
     {
+        $sSelector = str_replace([' :', ' : ', ': '], ' ', $sSelector);
         $this->sSelector = trim($sSelector);
         $this->iSpecificity = null;
     }