diff --git a/upnp/src/genlib/net/http/webserver.c b/upnp/src/genlib/net/http/webserver.c
index 0089aad..78eb006 100644
--- a/upnp/src/genlib/net/http/webserver.c
+++ b/upnp/src/genlib/net/http/webserver.c
@@ -158,6 +158,7 @@ static const char *gEncodedMediaTypes =
 	"au\0" AUDIO_STR "basic\0"
 	"avi\0" VIDEO_STR "msvideo\0"
 	"bmp\0" IMAGE_STR "bmp\0"
+	"css\0" TEXT_STR "css\0"
 	"dcr\0" APPLICATION_STR "x-director\0"
 	"dib\0" IMAGE_STR "bmp\0"
 	"dir\0" APPLICATION_STR "x-director\0"