diff --git a/src/components/checkbox/themes/checkbox.base.scss b/src/components/checkbox/themes/checkbox.base.scss
index 09a582b09..a5a653a05 100644
--- a/src/components/checkbox/themes/checkbox.base.scss
+++ b/src/components/checkbox/themes/checkbox.base.scss
@@ -56,7 +56,7 @@ $mark-length: 24;
     position: absolute;
     inset: 0;
     stroke-linecap: square;
-    stroke-width: var(--mark-stroke, 3);
+    stroke-width: var(--tick-width);
     stroke-dasharray: $mark-length;
     stroke-dashoffset: $mark-length;
     fill: none;
diff --git a/src/components/checkbox/themes/shared/checkbox/checkbox.fluent.scss b/src/components/checkbox/themes/shared/checkbox/checkbox.fluent.scss
index f84d3f7db..8bfd97d7f 100644
--- a/src/components/checkbox/themes/shared/checkbox/checkbox.fluent.scss
+++ b/src/components/checkbox/themes/shared/checkbox/checkbox.fluent.scss
@@ -39,7 +39,6 @@ $disabled-color: var-get($theme, 'disabled-color');
 
 [part~='indicator'] {
     --indicator-size: #{rem(16px)};
-    --mark-stroke: 1.5;
 }
 
 :host(:hover) {