diff --git a/src/themes/packages/default/modules/checkbox.variables b/src/themes/packages/default/modules/checkbox.variables
index d93e916be..8de15d512 100755
--- a/src/themes/packages/default/modules/checkbox.variables
+++ b/src/themes/packages/default/modules/checkbox.variables
@@ -77,6 +77,7 @@
 ;
 
 /* Slider */
+@sliderHeight: 1rem;
 @sliderSize: 1.5rem;
 @sliderHandleSize: @sliderSize;