diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1811c061bc..73829fc4cd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -22,6 +22,7 @@ We’ve made fixes to GOV.UK Frontend in the following pull requests:
 - [#1842: Preserve the state of conditional reveals when navigating 'back' in the browser](https://github.com/alphagov/govuk-frontend/pull/1842)
 - [#1855: Hint component can render block-level elements as valid HTML](https://github.com/alphagov/govuk-frontend/pull/1855)
 - [#1861: Fix the display of checkboxes when border-box box sizing is applied globally](https://github.com/alphagov/govuk-frontend/pull/1861)
+- [#1862: Fix display of warning text icon when border-box box sizing is applied globally #1862](https://github.com/alphagov/govuk-frontend/pull/1862)
 
 ## 3.7.0 (Feature release)
 
diff --git a/src/govuk/components/warning-text/_index.scss b/src/govuk/components/warning-text/_index.scss
index 6ed50c86f4..06ca717515 100644
--- a/src/govuk/components/warning-text/_index.scss
+++ b/src/govuk/components/warning-text/_index.scss
@@ -13,13 +13,15 @@
   .govuk-warning-text__icon {
     @include govuk-font($size: false, $weight: bold);
 
+    box-sizing: border-box;
+
     display: inline-block;
 
     position: absolute;
     left: 0;
 
-    min-width: 29px;
-    min-height: 29px;
+    min-width: 35px;
+    min-height: 35px;
     margin-top: -7px;
 
     @include govuk-media-query($from: tablet) {