diff --git a/INSTALL b/INSTALL
index 57551b264..29d37d2b0 100644
--- a/INSTALL
+++ b/INSTALL
@@ -296,3 +296,9 @@ SELINUX. Here's some sample commands for SELINUX:
     $ semanage fcontext -a -t httpd_sys_rw_content_t "/path_to_roundcube/logs(/.*)?"
     $ semanage fcontext -a -t httpd_sys_rw_content_t "/path_to_roundcube/temp(/.*)?"
     $ restorecon -Rv /path_to_roundcube/
+
+Microsoft IIS Server by default does not support WOFF fonts used in Elastic skin. It might be
+needed to add following MIME Types definitions (via web.config or IIS Manager):
+
+    .woff   application/font-woff
+    .woff2  application/font-woff2