diff --git a/updateversion.sh b/updateversion.sh
index 6cda2d7..ac57ffb 100755
--- a/updateversion.sh
+++ b/updateversion.sh
@@ -23,6 +23,13 @@ ZR_VERSION_FILE="src/zr/hgversion.h.inc"
 ZR_PRODUCT_NAME="Zombie:Reloaded"
 ZR_COPYRIGHT="Copyright (C) 2009  Greyscale, Richard Helgeby"
 ZR_BRANCH="zr-3.0-b2"
+ZR_REVISION=$(hg id -n):$(hg id -i)
+
+if [ $ZR_UNOFFICIAL = "true" ]
+then
+    ZR_REVISION="Unofficial build - based on $ZR_REVISION"
+fi
+
 ZR_LICENSE="GNU GPL, Version 3"
 ZR_DATE=$($ZR_DATEPATH -R)