diff --git a/tools/build/makeshorewall b/tools/build/makeshorewall
index d11b3bd5d..02d2a49c0 100644
--- a/tools/build/makeshorewall
+++ b/tools/build/makeshorewall
@@ -224,6 +224,11 @@ case $VERSION in
 	XMLPROJ=Shorewall-docs2
 	BUILDLRP=
 	;;
+    *ex)
+        CVSTAG=EXPERIMENTAL
+	XMLPROJ=Shorewall-docs2
+	BUILDLRP=
+	;;
     2.5.*)
         CVSTAG=HEAD
 	XMLPROJ=Shorewall-docs2