diff --git a/packages/tlschema/src/assets/TLImageAsset.ts b/packages/tlschema/src/assets/TLImageAsset.ts
index ebd004558..27fd614ba 100644
--- a/packages/tlschema/src/assets/TLImageAsset.ts
+++ b/packages/tlschema/src/assets/TLImageAsset.ts
@@ -27,7 +27,7 @@ export const imageAssetValidator: T.Validator<TLImageAsset> = createAssetValidat
 		name: T.string,
 		isAnimated: T.boolean,
 		mimeType: T.string.nullable(),
-		src: T.srcUrl,
+		src: T.srcUrl.nullable(),
 	})
 )
 
diff --git a/packages/tlschema/src/assets/TLVideoAsset.ts b/packages/tlschema/src/assets/TLVideoAsset.ts
index 6946dfcf8..bf8ea9003 100644
--- a/packages/tlschema/src/assets/TLVideoAsset.ts
+++ b/packages/tlschema/src/assets/TLVideoAsset.ts
@@ -27,7 +27,7 @@ export const videoAssetValidator: T.Validator<TLVideoAsset> = createAssetValidat
 		name: T.string,
 		isAnimated: T.boolean,
 		mimeType: T.string.nullable(),
-		src: T.srcUrl,
+		src: T.srcUrl.nullable(),
 	})
 )