diff --git a/src/murmur/Murmur.ice b/src/murmur/Murmur.ice
index 820b06e09..e6008f2ee 100644
--- a/src/murmur/Murmur.ice
+++ b/src/murmur/Murmur.ice
@@ -197,13 +197,18 @@ module Murmur
 	sequence<string> NameList;
 	dictionary<int, string> NameMap;
 	dictionary<string, int> IdMap;
-	dictionary<UserInfo, string> UserInfoMap;
 	sequence<byte> Texture;
 	dictionary<string, string> ConfigMap;
 	sequence<string> GroupNameList;
 	sequence<byte> CertificateDer;
 	sequence<CertificateDer> CertificateList;
 
+	/** User information map.
+         * Older versions of ice-php can't handle enums as keys. If you are using one of these, replace 'UserInfo' with 'byte'.
+         */
+
+	dictionary<UserInfo, string> UserInfoMap;
+
 	/** User and subchannel state. Read-only.
          **/
 	class Tree {