diff --git a/Iceshrimp.Frontend/Components/ComposeAttachment.razor b/Iceshrimp.Frontend/Components/ComposeAttachment.razor
index 44ad8cdd..f93c5ae4 100644
--- a/Iceshrimp.Frontend/Components/ComposeAttachment.razor
+++ b/Iceshrimp.Frontend/Components/ComposeAttachment.razor
@@ -10,15 +10,15 @@
 @inject IStringLocalizer<Localization> Loc;
 
 <div @ref="Attachment" class="attachment" @onclick="Select" @onclick:stopPropagation="true">
-    @if (File.ContentType.StartsWith("image"))
+    @if (File.ContentType.StartsWith("image") || Constants.CommonImageExtensions.Any(e => File.Filename.EndsWith(e)))
     {
         <img class="thumbnail" src="@File.ThumbnailUrl" alt="@File.Description"/>
     }
-    else if (File.ContentType.StartsWith("audio"))
+    else if (File.ContentType.StartsWith("audio") || Constants.CommonAudioExtensions.Any(e => File.Filename.EndsWith(e)))
     {
         <Icon Name="Icons.FileAudio" Size="5em"/>
     }
-    else if (File.ContentType.StartsWith("video"))
+    else if (File.ContentType.StartsWith("video") || Constants.CommonVideoExtensions.Any(e => File.Filename.EndsWith(e)))
     {
         <Icon Name="Icons.FileVideo" Size="5em"/>
     }