diff --git a/paasta_tools/kubernetes_tools.py b/paasta_tools/kubernetes_tools.py
index 6d93d9c81f..5151d42acf 100644
--- a/paasta_tools/kubernetes_tools.py
+++ b/paasta_tools/kubernetes_tools.py
@@ -1978,9 +1978,9 @@ def get_pod_template_spec(
             topology_spread_constraints=system_paasta_config.get_topology_spread_constraints(),
         )
         if pod_topology_spread_constraints:
-            constraints = pod_spec_kwargs.get("topologySpreadConstraints", [])
+            constraints = pod_spec_kwargs.get("topology_spread_constraints", [])
             constraints += pod_topology_spread_constraints
-            pod_spec_kwargs["topologySpreadConstraints"] = constraints
+            pod_spec_kwargs["topology_spread_constraints"] = constraints
 
         termination_grace_period = self.get_termination_grace_period()
         if termination_grace_period is not None: