diff --git a/src/python/gem5/components/cachehierarchies/chi/nodes/directory.py b/src/python/gem5/components/cachehierarchies/chi/nodes/directory.py
index 3488435d56..b93112a620 100644
--- a/src/python/gem5/components/cachehierarchies/chi/nodes/directory.py
+++ b/src/python/gem5/components/cachehierarchies/chi/nodes/directory.py
@@ -72,6 +72,7 @@ class SimpleDirectory(AbstractNode):
         self.alloc_on_readunique = False
         self.alloc_on_readonce = False
         self.alloc_on_writeback = False
+        self.alloc_on_atomic = False
         self.dealloc_on_unique = False
         self.dealloc_on_shared = False
         self.dealloc_backinv_unique = False
diff --git a/src/python/gem5/components/cachehierarchies/chi/nodes/dma_requestor.py b/src/python/gem5/components/cachehierarchies/chi/nodes/dma_requestor.py
index ccac6cae91..f6b63e0649 100644
--- a/src/python/gem5/components/cachehierarchies/chi/nodes/dma_requestor.py
+++ b/src/python/gem5/components/cachehierarchies/chi/nodes/dma_requestor.py
@@ -56,6 +56,7 @@ class DMARequestor(AbstractNode):
         self.alloc_on_readunique = False
         self.alloc_on_readonce = False
         self.alloc_on_writeback = False
+        self.alloc_on_atomic = False
         self.dealloc_on_unique = False
         self.dealloc_on_shared = False
         self.dealloc_backinv_unique = True
diff --git a/src/python/gem5/components/cachehierarchies/chi/nodes/private_l1_moesi_cache.py b/src/python/gem5/components/cachehierarchies/chi/nodes/private_l1_moesi_cache.py
index 3e38c9038f..2f618491ca 100644
--- a/src/python/gem5/components/cachehierarchies/chi/nodes/private_l1_moesi_cache.py
+++ b/src/python/gem5/components/cachehierarchies/chi/nodes/private_l1_moesi_cache.py
@@ -66,6 +66,7 @@ class PrivateL1MOESICache(AbstractNode):
         self.alloc_on_readunique = True
         self.alloc_on_readonce = True
         self.alloc_on_writeback = False  # Should never happen in an L1
+        self.alloc_on_atomic = False
         self.dealloc_on_unique = False
         self.dealloc_on_shared = False
         self.dealloc_backinv_unique = True