diff --git a/slic/utils/opmsg.py b/slic/utils/opmsg.py
index a1d7d877f..2556983c4 100644
--- a/slic/utils/opmsg.py
+++ b/slic/utils/opmsg.py
@@ -183,7 +183,8 @@ class OperationMessageStatus:
         allowed = self.get_allowed()
         if value not in allowed:
             raise ValueError(f'value "{value}" is not from allowed values: {allowed}')
-        self.pv_status.put(value)
+        ######################################################## sinon synchrone 
+        self.pv_status.put(value, wait=True)
 
     def get_allowed(self):
         return ["OFFLINE", "PREPARATION", "REMOTE", "ATTENDED"]