diff --git a/assets/timber.scss.liquid b/assets/timber.scss.liquid
index f05341557..b93ba7b5a 100755
--- a/assets/timber.scss.liquid
+++ b/assets/timber.scss.liquid
@@ -217,7 +217,9 @@ $socialIconFontStack: 'icons';
 ==============================================================================*/
 $min: min-width;
 $max: max-width;
-@mixin at-query ($constraint, $viewport1, $viewport2:null) {
+@mixin at-query ($constraint_, $viewport1_, $viewport2_:null) {
+ $constraint: $constraint_; $viewport1:$viewport1_; $viewport2:$viewport2_;
+  @if type-of($constraint_) == number { $viewport1 : $constraint_; $viewport2 : $viewport1_; $constraint : null; }
   @if $constraint == $min {
     @media screen and ($min: $viewport1) {
       @content;