diff --git a/plugins/Perturbation/EZFIO.cfg b/plugins/Perturbation/EZFIO.cfg
index 3f8c84dd..5a6ff5f7 100644
--- a/plugins/Perturbation/EZFIO.cfg
+++ b/plugins/Perturbation/EZFIO.cfg
@@ -28,5 +28,5 @@ default: 0.999
 type: Threshold
 doc: Thresholds on selectors (fraction of the norm) for final PT2 calculation
 interface: ezfio,provider,ocaml
-default:        1.
+default: 1.