diff --git a/extensions/markdown-language-features/src/languageFeatures/copyFiles/shared.ts b/extensions/markdown-language-features/src/languageFeatures/copyFiles/shared.ts
index fc232bfeecb..4ab245c192b 100644
--- a/extensions/markdown-language-features/src/languageFeatures/copyFiles/shared.ts
+++ b/extensions/markdown-language-features/src/languageFeatures/copyFiles/shared.ts
@@ -20,6 +20,7 @@ enum MediaKind {
 
 export const mediaFileExtensions = new Map<string, MediaKind>([
 	// Images
+	['avif', MediaKind.Image],
 	['bmp', MediaKind.Image],
 	['gif', MediaKind.Image],
 	['ico', MediaKind.Image],
diff --git a/extensions/markdown-language-features/src/util/mimes.ts b/extensions/markdown-language-features/src/util/mimes.ts
index 8028294b3f4..f33b807b83e 100644
--- a/extensions/markdown-language-features/src/util/mimes.ts
+++ b/extensions/markdown-language-features/src/util/mimes.ts
@@ -9,6 +9,7 @@ export const Mime = {
 } as const;
 
 export const mediaMimes = new Set([
+	'image/avif',
 	'image/bmp',
 	'image/gif',
 	'image/jpeg',