diff --git a/main/http.c b/main/http.c
index f3c64cc00d..be4224ec90 100644
--- a/main/http.c
+++ b/main/http.c
@@ -110,6 +110,7 @@ static struct {
 	{ "gif", "image/gif" },
 	{ "html", "text/html" },
 	{ "htm", "text/html" },
+	{ "css", "text/css" },
 	{ "cnf", "text/plain" },
 	{ "cfg", "text/plain" },
 	{ "bin", "application/octet-stream" },