diff --git a/.changeset/fair-teachers-protect.md b/.changeset/fair-teachers-protect.md
new file mode 100644
index 000000000000..df8215b9f795
--- /dev/null
+++ b/.changeset/fair-teachers-protect.md
@@ -0,0 +1,5 @@
+---
+'astro': patch
+---
+
+Fix small types issues related to `astro:assets`'s AVIF support and `getImage`
diff --git a/packages/astro/client.d.ts b/packages/astro/client.d.ts
index 146ab8355ecf..5f396b522f4c 100644
--- a/packages/astro/client.d.ts
+++ b/packages/astro/client.d.ts
@@ -48,9 +48,7 @@ declare module 'astro:assets' {
 		 * This is functionally equivalent to using the `<Image />` component, as the component calls this function internally.
 		 */
 		getImage: (
-			options:
-				| import('./dist/assets/types.js').ImageTransform
-				| import('./dist/assets/types.js').UnresolvedImageTransform
+			options: import('./dist/assets/types.js').UnresolvedImageTransform
 		) => Promise<import('./dist/assets/types.js').GetImageResult>;
 		imageConfig: import('./dist/@types/astro.js').AstroConfig['image'];
 		getConfiguredImageService: typeof import('./dist/assets/index.js').getConfiguredImageService;
diff --git a/packages/astro/content-types.template.d.ts b/packages/astro/content-types.template.d.ts
index eb560193d4a7..4d59d140fd2e 100644
--- a/packages/astro/content-types.template.d.ts
+++ b/packages/astro/content-types.template.d.ts
@@ -33,6 +33,7 @@ declare module 'astro:content' {
 				import('astro/zod').ZodLiteral<'webp'>,
 				import('astro/zod').ZodLiteral<'gif'>,
 				import('astro/zod').ZodLiteral<'svg'>,
+				import('astro/zod').ZodLiteral<'avif'>,
 			]
 		>;
 	}>;
diff --git a/packages/astro/src/@types/astro.ts b/packages/astro/src/@types/astro.ts
index 10e15b6ffd74..109629428ca8 100644
--- a/packages/astro/src/@types/astro.ts
+++ b/packages/astro/src/@types/astro.ts
@@ -48,6 +48,7 @@ export type {
 	ImageQuality,
 	ImageQualityPreset,
 	ImageTransform,
+	UnresolvedImageTransform,
 } from '../assets/types.js';
 export type { RemotePattern } from '../assets/utils/remotePattern.js';
 export type { SSRManifest } from '../core/app/types.js';
diff --git a/packages/astro/src/assets/internal.ts b/packages/astro/src/assets/internal.ts
index 9d2c9eb0e1d8..f6c3b0b52cb9 100644
--- a/packages/astro/src/assets/internal.ts
+++ b/packages/astro/src/assets/internal.ts
@@ -67,7 +67,7 @@ export async function getConfiguredImageService(): Promise<ImageService> {
 }
 
 export async function getImage(
-	options: ImageTransform | UnresolvedImageTransform,
+	options: UnresolvedImageTransform,
 	imageConfig: AstroConfig['image']
 ): Promise<GetImageResult> {
 	if (!options || typeof options !== 'object') {
diff --git a/packages/astro/src/assets/types.ts b/packages/astro/src/assets/types.ts
index 0bf740d573bc..1712cda1cb85 100644
--- a/packages/astro/src/assets/types.ts
+++ b/packages/astro/src/assets/types.ts
@@ -28,8 +28,11 @@ export interface ImageMetadata {
 	orientation?: number;
 }
 
+/**
+ * A yet to be resolved image transform. Used by `getImage`
+ */
 export type UnresolvedImageTransform = Omit<ImageTransform, 'src'> & {
-	src: Promise<{ default: ImageMetadata }>;
+	src: ImageMetadata | string | Promise<{ default: ImageMetadata }>;
 };
 
 /**