diff --git a/scheme/httpd/file-dir-handler.scm b/scheme/httpd/file-dir-handler.scm
index ba13d62..1453472 100644
--- a/scheme/httpd/file-dir-handler.scm
+++ b/scheme/httpd/file-dir-handler.scm
@@ -502,6 +502,7 @@
      ((string-ci=? ext ".htm")		"text/html")
      ((string-ci=? ext ".html")		"text/html")
      ((string-ci=? ext ".txt")       	"text/plain")
+     ((string-ci=? ext ".css")          "text/css")
      ((string-ci=? ext ".doc")       	"application/msword")
      ((string-ci=? ext ".gif")		"image/gif")
      ((string-ci=? ext ".png")		"image/png")