diff --git a/UNRELEASED.md b/UNRELEASED.md
index 64bcba9e849..e29913b6516 100644
--- a/UNRELEASED.md
+++ b/UNRELEASED.md
@@ -20,6 +20,7 @@ Use [the changelog guidelines](https://git.io/polaris-changelog-guidelines) to f
 - Fixed 200ms visual delay when activating `Popover` ([#2209](https://github.com/Shopify/polaris-react/pull/2209))
 - Fixed `ResourceList` `Item` deselect ([#1952](https://github.com/Shopify/polaris-react/pull/1952))
 - Fixed `Subheading`’s `font-weight` ([#2218](https://github.com/Shopify/polaris-react/pull/2218))
+- Fixed `fullWidth` `CardSection`s when contained in a page with a `Nav` ([#2227](https://github.com/Shopify/polaris-react/pull/2227))
 
 ### Documentation
 
diff --git a/src/components/Card/Card.scss b/src/components/Card/Card.scss
index 606008be036..6a96c105f37 100644
--- a/src/components/Card/Card.scss
+++ b/src/components/Card/Card.scss
@@ -43,7 +43,11 @@
 }
 
 .Section-fullWidth {
-  padding: spacing(loose) spacing(none);
+  padding: spacing() spacing(none);
+
+  @include page-content-when-not-fully-condensed {
+    padding: spacing(loose) spacing(none);
+  }
 }
 
 .Section-subdued {