diff --git a/src/kits/network/libnetapi/FileRequest.cpp b/src/kits/network/libnetapi/FileRequest.cpp
index d24285758d..cfbd5910b4 100644
--- a/src/kits/network/libnetapi/FileRequest.cpp
+++ b/src/kits/network/libnetapi/FileRequest.cpp
@@ -59,6 +59,8 @@ BFileRequest::_ProtocolLoop()
 
 		BNodeInfo info(&file);
 		char mimeType[B_MIME_TYPE_LENGTH + 1];
+		if (info.GetType(mimeType) != B_OK)
+			update_mime_info(fUrl.Path().String(), false, true, false);
 		if (info.GetType(mimeType) == B_OK)
 			fResult.SetContentType(mimeType);