diff --git a/mesa/experimental/cell_space/cell_collection.py b/mesa/experimental/cell_space/cell_collection.py
index ead67021532..ca49a472ed0 100644
--- a/mesa/experimental/cell_space/cell_collection.py
+++ b/mesa/experimental/cell_space/cell_collection.py
@@ -48,8 +48,10 @@ def __init__(
         else:
             self._cells = {cell: cell.agents for cell in cells}
 
-        #
-        self._capacity: int = next(iter(self._cells.keys())).capacity
+        # Get capacity from first cell if collection is not empty
+        self._capacity: int | None = (
+            next(iter(self._cells.keys())).capacity if self._cells else None
+        )
 
         if random is None:
             warnings.warn(