diff --git a/lib/optimizer/validator.js b/lib/optimizer/validator.js
index 3e2a5c88..37eb4eca 100644
--- a/lib/optimizer/validator.js
+++ b/lib/optimizer/validator.js
@@ -339,6 +339,12 @@ var Units = [
   '%',
   'ch',
   'cm',
+  'cqw',
+  'cqh',
+  'cqi',
+  'cqb',
+  'cqmin',
+  'cqmax',
   'em',
   'ex',
   'in',