diff --git a/src/bcf/src/bcf/v2/topic.py b/src/bcf/src/bcf/v2/topic.py
index 8587522ec0..94c36068b3 100644
--- a/src/bcf/src/bcf/v2/topic.py
+++ b/src/bcf/src/bcf/v2/topic.py
@@ -241,8 +241,8 @@ class TopicHandler:
         self.add_visinfo_handler(vi_handler)
 
     def add_visinfo_handler(self, new_viewpoint: VisualizationInfoHandler) -> None:
-        self.viewpoints[new_viewpoint.guid] = new_viewpoint
-        self.markup.viewpoints.append(mdl.ViewPoint(viewpoint=new_viewpoint.guid, guid=new_viewpoint.guid))
+        self.viewpoints[new_viewpoint.guid + ".bcfv"] = new_viewpoint
+        self.markup.viewpoints.append(mdl.ViewPoint(viewpoint=new_viewpoint.guid + ".bcfv", guid=new_viewpoint.guid))
 
     def __eq__(self, other: object) -> bool | NoReturn:
         return (
diff --git a/src/bcf/src/bcf/v3/topic.py b/src/bcf/src/bcf/v3/topic.py
index bc77fd448e..188a4b3f81 100644
--- a/src/bcf/src/bcf/v3/topic.py
+++ b/src/bcf/src/bcf/v3/topic.py
@@ -187,10 +187,10 @@ class TopicHandler:
         self.add_visinfo_handler(vi_handler)
 
     def add_visinfo_handler(self, new_viewpoint: VisualizationInfoHandler) -> None:
-        self.viewpoints[new_viewpoint.guid] = new_viewpoint
+        self.viewpoints[new_viewpoint.guid + ".bcfv"] = new_viewpoint
         if self.topic.viewpoints is None:
             self.topic.viewpoints = mdl.TopicViewpoints()
-        self.topic.viewpoints.view_point.append(mdl.ViewPoint(viewpoint=new_viewpoint.guid, guid=new_viewpoint.guid))
+        self.topic.viewpoints.view_point.append(mdl.ViewPoint(viewpoint=new_viewpoint.guid + ".bcfv", guid=new_viewpoint.guid))
 
     def __eq__(self, other: object) -> bool | NoReturn:
         return (