diff --git a/src/charm.py b/src/charm.py
index a61586b9b..ee1659933 100755
--- a/src/charm.py
+++ b/src/charm.py
@@ -246,6 +246,10 @@ def __init__(self, *args: Any, **kwargs: Any) -> None:
             self.on[DEBUG_SSH_INTEGRATION_NAME].relation_changed,
             self._on_debug_ssh_relation_changed,
         )
+        self.framework.observe(
+            self.on[IMAGE_INTEGRATION_NAME].relation_joined,
+            self._on_image_relation_joined,
+        )
         self.framework.observe(
             self.on[IMAGE_INTEGRATION_NAME].relation_changed,
             self._on_image_relation_changed,
@@ -1178,7 +1182,7 @@ def _on_image_relation_joined(self, _: ops.RelationJoinedEvent) -> None:
         cloud = list(clouds_yaml["clouds"].keys())[0]
         auth_map = clouds_yaml["clouds"][cloud]["auth"]
         for relation in self.model.relations[IMAGE_INTEGRATION_NAME]:
-            relation.data[self.model.unit].update(auth_map)
+            relation.data[self.unit].update(auth_map)
 
     @catch_charm_errors
     def _on_image_relation_changed(self, _: ops.RelationChangedEvent) -> None: