diff --git a/.changeset/four-bugs-repeat.md b/.changeset/four-bugs-repeat.md
new file mode 100644
index 0000000000..65078189c2
--- /dev/null
+++ b/.changeset/four-bugs-repeat.md
@@ -0,0 +1,5 @@
+---
+'@swisspost/design-system-styles': patch
+---
+
+Fixed a broken CSS selector in the alerts styles. The file now produces valid output again.
diff --git a/packages/styles/src/components/alert.scss b/packages/styles/src/components/alert.scss
index 9be83b6b5d..796c8f9c7c 100644
--- a/packages/styles/src/components/alert.scss
+++ b/packages/styles/src/components/alert.scss
@@ -76,10 +76,11 @@
       > ::slotted(.btn) {
         flex: 1 0 0;
         width: 100%;
+      }
 
-        &:first-child {
-          margin-inline-start: 0;
-        }
+      > .btn:first-child,
+      > ::slotted(.btn:first-child) {
+        margin-inline-start: 0;
       }
     }
   }