diff --git a/binaries/data/mods/official/gui/gui.dtd b/binaries/data/mods/official/gui/gui.dtd
index 79d93ed610..7cb5a1d470 100755
--- a/binaries/data/mods/official/gui/gui.dtd
+++ b/binaries/data/mods/official/gui/gui.dtd
@@ -119,6 +119,15 @@
   minimum-bar-size			CDATA #IMPLIED
 >
 
+<!--
+	<icon>
+-->
+<!ATTLIST icon
+  name					CDATA #REQUIRED
+  texture				CDATA #REQUIRED
+  size					CDATA #REQUIRED
+>
+
 <!--
 	<sprites>
 -->