diff --git a/site_ansto/Makefile b/site_ansto/Makefile
index 816c829e..123eba18 100644
--- a/site_ansto/Makefile
+++ b/site_ansto/Makefile
@@ -93,7 +93,7 @@ ifeq (,$(LIB_HTTP))
   $(warning LIB_HTTP not found)
 endif
 
-REVISION = $(shell svn info | grep "Revision:" | cut -d ' ' -f 2)
+REVISION = $(shell svn info --recursive .. | grep "Revision:" | sort -u | tail -n 1 | cut -d ' ' -f 2)
 $(shell touch site_ansto.c)
 $(info Revision text is "${REVISION}")
 #