diff --git a/src/python/flux_k8s/directivebreakdown.py b/src/python/flux_k8s/directivebreakdown.py
index 1df2991..207284d 100644
--- a/src/python/flux_k8s/directivebreakdown.py
+++ b/src/python/flux_k8s/directivebreakdown.py
@@ -46,7 +46,7 @@ def validate(self, nodecount):
             requested = getattr(self, attr)
             allowable = getattr(type(self), attr)
             if attr == "lustre":
-                requested = requested / nodecount
+                requested = requested // nodecount
             if allowable is not None and requested > allowable:
                 raise ValueError(
                     f"Requested a total of {requested} GiB of {attr} storage "