diff --git a/ui/src/App.vue b/ui/src/App.vue
index 284ec32..4bb1b07 100644
--- a/ui/src/App.vue
+++ b/ui/src/App.vue
@@ -64,7 +64,7 @@ export default class extends Vue {
         this.subtitle = subtitle;
         this.footer = footer;
       })
-      .catch((error) => alert(this.$advent22.format_user_error(error)));
+      .catch(this.$advent22.alert_user_error);
   }
 }
 </script>
diff --git a/ui/src/components/AdminButton.vue b/ui/src/components/AdminButton.vue
index feac184..09f0978 100644
--- a/ui/src/components/AdminButton.vue
+++ b/ui/src/components/AdminButton.vue
@@ -44,7 +44,7 @@ export default class extends Vue {
 
     this.store
       .login(creds)
-      .catch((error) => alert(this.$advent22.format_user_error(error)))
+      .catch(this.$advent22.alert_user_error)
       .finally(() => (this.is_busy = false));
   }
 
diff --git a/ui/src/components/Calendar.vue b/ui/src/components/Calendar.vue
index 8b48546..7cacefa 100644
--- a/ui/src/components/Calendar.vue
+++ b/ui/src/components/Calendar.vue
@@ -64,7 +64,7 @@ export default class extends Vue {
     this.$advent22
       .api_get<number | null>("user/next_door")
       .then((next_door) => (this.next_door = next_door))
-      .catch((error) => alert(this.$advent22.format_user_error(error)));
+      .catch(this.$advent22.alert_user_error);
   }
 
   public modal_handle(modal: MultiModal) {
diff --git a/ui/src/components/UserView.vue b/ui/src/components/UserView.vue
index 6d19a1f..cf7fe3b 100644
--- a/ui/src/components/UserView.vue
+++ b/ui/src/components/UserView.vue
@@ -27,7 +27,7 @@ export default class extends Vue {
           this.doors.push(Door.load(value));
         }
       })
-      .catch((error) => alert(this.$advent22.format_user_error(error)));
+      .catch(this.$advent22.alert_user_error);
   }
 }
 </script>
diff --git a/ui/src/components/admin/DoorMapEditor.vue b/ui/src/components/admin/DoorMapEditor.vue
index 4152d05..924fb33 100644
--- a/ui/src/components/admin/DoorMapEditor.vue
+++ b/ui/src/components/admin/DoorMapEditor.vue
@@ -116,7 +116,7 @@ export default class extends Vue {
           resolve();
         })
         .catch((error) => {
-          alert(this.$advent22.format_user_error(error));
+          this.$advent22.alert_user_error(error);
           reject();
         });
     });
@@ -134,7 +134,7 @@ export default class extends Vue {
         .api_put("admin/doors", data)
         .then(resolve)
         .catch((error) => {
-          alert(this.$advent22.format_user_error(error));
+          this.$advent22.alert_user_error(error);
           reject();
         });
     });
diff --git a/ui/src/plugins/advent22.ts b/ui/src/plugins/advent22.ts
index 4aad478..d9d3152 100644
--- a/ui/src/plugins/advent22.ts
+++ b/ui/src/plugins/advent22.ts
@@ -77,6 +77,10 @@ export class Advent22 {
     return result();
   }
 
+  public alert_user_error(param: [unknown, string]): void {
+    alert(this.format_user_error(param));
+  }
+
   public api_url(): string;
   public api_url(endpoint: string): string;
   public api_url(endpoint?: string): string {