diff --git a/client/scss/components/_header.scss b/client/scss/components/_header.scss
index b32009f..9651bc2 100644
--- a/client/scss/components/_header.scss
+++ b/client/scss/components/_header.scss
@@ -39,7 +39,7 @@ header {
 
   .btn {
     width: 2 * $columnWidth;
-    margin-left: math.div($columnGap, 2);
+    margin-left: calc($columnGap / 2);
   }
 
   h1 {