diff --git a/omemo/omemoplugin.py b/omemo/omemoplugin.py
index 45ce5bb..8b4a71b 100644
--- a/omemo/omemoplugin.py
+++ b/omemo/omemoplugin.py
@@ -589,6 +589,9 @@ class OmemoPlugin(GajimPlugin):
             -------
             Return if encryption is not activated
         """
+        if event.type_ == 'normal':
+            return False
+
         account = event.account
         if account in self.disabled_accounts:
             return