diff --git a/.changeset/smart-islands-jog.md b/.changeset/smart-islands-jog.md
new file mode 100644
index 0000000000..50bc36191f
--- /dev/null
+++ b/.changeset/smart-islands-jog.md
@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-catalog-backend': patch
+---
+
+Fix OpenAPI schema for the facets endpoint
diff --git a/plugins/catalog-backend/src/schema/openapi.generated.ts b/plugins/catalog-backend/src/schema/openapi.generated.ts
index 7428e5ace2..77f33a2ca5 100644
--- a/plugins/catalog-backend/src/schema/openapi.generated.ts
+++ b/plugins/catalog-backend/src/schema/openapi.generated.ts
@@ -1087,7 +1087,10 @@ export const spec = {
             name: 'facet',
             required: true,
             schema: {
-              type: 'string',
+              type: 'array',
+              items: {
+                type: 'string',
+              },
             },
           },
           {
diff --git a/plugins/catalog-backend/src/schema/openapi.yaml b/plugins/catalog-backend/src/schema/openapi.yaml
index 34e21adffd..79049955d9 100644
--- a/plugins/catalog-backend/src/schema/openapi.yaml
+++ b/plugins/catalog-backend/src/schema/openapi.yaml
@@ -819,7 +819,9 @@ paths:
           name: facet
           required: true
           schema:
-            type: string
+            type: array
+            items:
+              type: string
         - $ref: '#/components/parameters/filter'
   /locations:
     post: