diff --git a/plugins/b64.py b/plugins/b64.py
index 3557229c..9b4c4ab3 100644
--- a/plugins/b64.py
+++ b/plugins/b64.py
@@ -27,7 +27,13 @@ from typing import List, Optional
 from slixmpp import Message, JID
 
 from poezio.plugin_e2ee import E2EEPlugin
-from poezio.tabs import ChatTab
+from poezio.tabs import (
+    ChatTab,
+    MucTab,
+    PrivateTab,
+    DynamicConversationTab,
+    StaticConversationTab,
+)
 
 
 class Plugin(E2EEPlugin):
@@ -40,6 +46,14 @@ class Plugin(E2EEPlugin):
     # This encryption mechanism is using <body/> as a container
     replace_body_with_eme = False
 
+    # In what tab is it ok to use this plugin. Here we want all of them
+    supported_tab_types = (
+        MucTab,
+        PrivateTab,
+        DynamicConversationTab,
+        StaticConversationTab,
+    )
+
     async def decrypt(self, message: Message, jid: Optional[JID], _tab: Optional[ChatTab]) -> None:
         """
             Decrypt base64
diff --git a/poezio/plugin_e2ee.py b/poezio/plugin_e2ee.py
index a6ad6bcd..9381fe76 100644
--- a/poezio/plugin_e2ee.py
+++ b/poezio/plugin_e2ee.py
@@ -131,7 +131,7 @@ class E2EEPlugin(BasePlugin):
     _enabled_tabs: Dict[JID, Callable] = {}
 
     # Tabs that support this encryption mechanism
-    supported_tab_types: Tuple[Type[ChatTabs], ...] = tuple()
+    supported_tab_types: Tuple[Type[ChatTab], ...] = tuple()
 
     # States for each remote entity
     trust_states: Dict[str, Set[str]] = {'accepted': set(), 'rejected': set()}