diff --git a/avalanche/training/supervised/supervised_contrastive_replay.py b/avalanche/training/supervised/supervised_contrastive_replay.py
index 8eba2c6bc..f4dd44a0a 100644
--- a/avalanche/training/supervised/supervised_contrastive_replay.py
+++ b/avalanche/training/supervised/supervised_contrastive_replay.py
@@ -34,6 +34,7 @@ class SCR(SupervisedTemplate):
 
     def __init__(
         self,
+        *,
         model: SCRModel,
         optimizer: Optimizer,
         augmentations=Compose([Lambda(lambda el: el)]),