diff --git a/services/comparison/__init__.py b/services/comparison/__init__.py
index 914cd7257..f4c34b0b9 100644
--- a/services/comparison/__init__.py
+++ b/services/comparison/__init__.py
@@ -182,7 +182,14 @@ async def get_behind_by(self):
                             ),
                         )
                         return None
-
+                    except KeyError:
+                        log.warning(
+                            "Error fetching base branch from Git provider",
+                            extra=dict(
+                                branch=branch_to_get,
+                            ),
+                        )
+                        return None
                     self._branch = branch_response
 
                 distance = await self.repository_service.get_distance_in_commits(