diff --git a/lib/ace/ext/modelist.js b/lib/ace/ext/modelist.js
index 88b0218d..3be793f7 100644
--- a/lib/ace/ext/modelist.js
+++ b/lib/ace/ext/modelist.js
@@ -140,6 +140,7 @@ var supportedModes = {
     VBScript:    ["vbs"],
     Velocity:    ["vm"],
     Verilog:     ["v|vh|sv|svh"],
+    VHDL:        ["vhd|vhdl"],
     XML:         ["xml|rdf|rss|wsdl|xslt|atom|mathml|mml|xul|xbl"],
     XQuery:      ["xq"],
     YAML:        ["yaml|yml"]