diff --git a/src/java/org/apache/cassandra/tcm/CMSOperations.java b/src/java/org/apache/cassandra/tcm/CMSOperations.java
index 754d858625..e013150d1b 100644
--- a/src/java/org/apache/cassandra/tcm/CMSOperations.java
+++ b/src/java/org/apache/cassandra/tcm/CMSOperations.java
@@ -184,7 +184,7 @@ public class CMSOperations implements CMSOperationsMBean
     private void guardMinimumCmsSize(ReplicationParams params)
     {
         ClusterMetadata metadata = ClusterMetadata.current();
-        int minCmsSize = DatabaseDescriptor.getGuardrailsConfig().getMinimumCmsSizeFailThreshold();
+        int minCmsSize = Guardrails.instance.getMinimumCmsSizeFailThreshold();
         int totalNodes = metadata.directory.allJoinedEndpoints().size();
         // Skip clusters smaller than the threshold: they cannot host that many replicas yet (e.g. during bootstrap).
         // When the guardrail is disabled this is never true, and guard() below is then a no-op.