diff --git a/src/fmu/sumo/explorer/objects/surface_collection.py b/src/fmu/sumo/explorer/objects/surface_collection.py
index 9966a4b8..0230bd1b 100644
--- a/src/fmu/sumo/explorer/objects/surface_collection.py
+++ b/src/fmu/sumo/explorer/objects/surface_collection.py
@@ -133,7 +133,7 @@ def _aggregate(self, operation: str) -> xtgeo.RegularSurface:
             object_ids = list(map(lambda obj: obj["_id"], objects))
 
             res = self._sumo.post(
-                "/aggregate",
+                "/surface/aggregate",
                 json={"operation": [operation], "object_ids": object_ids},
             )
 
@@ -151,7 +151,7 @@ async def _aggregate_async(self, operation: str) -> xtgeo.RegularSurface:
             object_ids = list(map(lambda obj: obj["_id"], objects))
 
             res = await self._sumo.post_async(
-                "/aggregate",
+                "/surface/aggregate",
                 json={"operation": [operation], "object_ids": object_ids},
             )