diff --git a/make_rpm.py b/make_rpm.py
index 6239291..e72198a 100755
--- a/make_rpm.py
+++ b/make_rpm.py
@@ -24,7 +24,7 @@ class build(object):
     self.output_dir = "/shd/CTC/TOOLS/TDS-rpmbuild/"
     self.version_maj = 1
     self.version_min = 1
-    self.version_rev = 0
+    self.version_rev = os.getenv( "BUILD_NUMBER" )
     self.cmake_version_prefix = "TDS"
     self.source_dir_rel = "legatus"