diff --git a/packages/llm/llm-pi-ai/src/catalog.ts b/packages/llm/llm-pi-ai/src/catalog.ts
index 5a42ac9220..c945800bea 100644
--- a/packages/llm/llm-pi-ai/src/catalog.ts
+++ b/packages/llm/llm-pi-ai/src/catalog.ts
@@ -356,7 +356,6 @@ export type EveryOfferedFieldIsDocumented = AssertNever<Exclude<OfferedCompatFie
  */
 function configuredCompatEntries(compat: PiAiCompatProfile | undefined): readonly (readonly [string, unknown])[] {
   return Object.entries(compat ?? {}).flatMap(([field, value]) => {
-    if (value === undefined) return []
     const empty = typeof value === 'object' && value !== null && !Array.isArray(value)
       && Object.keys(value as object).length === 0
     return empty ? [] : [[field, value] as const]
diff --git a/packages/llm/llm-pi-ai/tests/catalog.spec.ts b/packages/llm/llm-pi-ai/tests/catalog.spec.ts
index 83fd8958d0..8997556871 100644
--- a/packages/llm/llm-pi-ai/tests/catalog.spec.ts
+++ b/packages/llm/llm-pi-ai/tests/catalog.spec.ts
@@ -919,19 +919,6 @@ describe('compat switches', () => {
     })
   })
 
-  it('ignores compat entries whose value is undefined', () => {
-    const models = modelsOf({
-      'acme-gateway': {
-        api: 'openai-completions',
-        baseURL: 'https://acme.test',
-        compat: { supportsStore: undefined },
-        models: [{ id: 'acme-a' }],
-      },
-    }, 'acme-gateway')
-
-    expect(models.get('acme-a')?.compat).toBeUndefined()
-  })
-
   it('rejects a model switch on an unrecognized protocol as having no configurable compat', () => {
     expect(() => resolveProfiles({
       'acme-gateway': {