print error on exit

diff --git a/bin/swift-get-nodes b/bin/swift-get-nodes
index d52480e..00ae50a 100755
--- a/bin/swift-get-nodes
+++ b/bin/swift-get-nodes
@@ -52,8 +52,9 @@ if __name__ == '__main__':
 
     try:
         ring_path, args = parse_get_node_args(options, args)
-    except InfoSystemExit:
-        sys.exit(parser.print_help())
+    except InfoSystemExit as e:
+        parser.print_help()
+        sys.exit('ERROR: %s' % e)
 
     ring = ring_name = None
     if ring_path: