diff --git a/api/v1/hypervisor_types.go b/api/v1/hypervisor_types.go
index e38a2e3..e0c9b4d 100644
--- a/api/v1/hypervisor_types.go
+++ b/api/v1/hypervisor_types.go
@@ -191,10 +191,13 @@ type OperatingSystemStatus struct {
 }
 
 // Current capabilities reported by libvirt.
+//
+// The keys provided here should correspond to the capabilities expected
+// by openstack's flavor extra specs, like 'capabilities:arch'.
 type CapabilitiesStatus struct {
 	// +kubebuilder:default:=unknown
 	// The hosts CPU architecture (not the guests).
-	HostCpuArch string `json:"cpuArch,omitempty"`
+	HostCpuArch string `json:"arch,omitempty"`
 	// Total host memory available as a sum of memory over all numa cells.
 	HostMemory resource.Quantity `json:"memory,omitempty"`
 	// Total host cpus available as a sum of cpus over all numa cells.
diff --git a/applyconfigurations/api/v1/capabilitiesstatus.go b/applyconfigurations/api/v1/capabilitiesstatus.go
index 0ab1ec7..bb282ef 100644
--- a/applyconfigurations/api/v1/capabilitiesstatus.go
+++ b/applyconfigurations/api/v1/capabilitiesstatus.go
@@ -9,7 +9,7 @@ import (
 // CapabilitiesStatusApplyConfiguration represents a declarative configuration of the CapabilitiesStatus type for use
 // with apply.
 type CapabilitiesStatusApplyConfiguration struct {
-	HostCpuArch *string            `json:"cpuArch,omitempty"`
+	HostCpuArch *string            `json:"arch,omitempty"`
 	HostMemory  *resource.Quantity `json:"memory,omitempty"`
 	HostCpus    *resource.Quantity `json:"cpus,omitempty"`
 }
diff --git a/charts/openstack-hypervisor-operator/crds/hypervisor-crd.yaml b/charts/openstack-hypervisor-operator/crds/hypervisor-crd.yaml
index fe36d98..4539ff2 100644
--- a/charts/openstack-hypervisor-operator/crds/hypervisor-crd.yaml
+++ b/charts/openstack-hypervisor-operator/crds/hypervisor-crd.yaml
@@ -186,7 +186,7 @@ spec:
               capabilities:
                 description: The capabilities of the hypervisors as reported by libvirt.
                 properties:
-                  cpuArch:
+                  arch:
                     default: unknown
                     description: The hosts CPU architecture (not the guests).
                     type: string
diff --git a/config/crd/bases/kvm.cloud.sap_hypervisors.yaml b/config/crd/bases/kvm.cloud.sap_hypervisors.yaml
index 311ba15..681242b 100644
--- a/config/crd/bases/kvm.cloud.sap_hypervisors.yaml
+++ b/config/crd/bases/kvm.cloud.sap_hypervisors.yaml
@@ -187,7 +187,7 @@ spec:
               capabilities:
                 description: The capabilities of the hypervisors as reported by libvirt.
                 properties:
-                  cpuArch:
+                  arch:
                     default: unknown
                     description: The hosts CPU architecture (not the guests).
                     type: string