diff --git a/ts/types/MIME.ts b/ts/types/MIME.ts
index ed1e3b5fd..3ac85dbfb 100644
--- a/ts/types/MIME.ts
+++ b/ts/types/MIME.ts
@@ -1,14 +1,14 @@
 export type MIMEType = string & { _mimeTypeBrand: any };
 
 
-export const isVideo = (value: MIMEType): boolean =>
-  value.startsWith('video/') && value !== 'video/wmv';
+export const isJPEG = (value: MIMEType): boolean =>
+  value === 'image/jpeg';
 
 export const isImage = (value: MIMEType): boolean =>
-  value.startsWith('image/') && value !== 'image/tiff';
+  value.startsWith('image/');
+
+export const isVideo = (value: MIMEType): boolean =>
+  value.startsWith('video/');
 
 export const isAudio = (value: MIMEType): boolean =>
   value.startsWith('audio/');
-
-export const isJPEG = (value: MIMEType): boolean =>
-  value === 'image/jpeg';