diff --git a/nixos/modules/profiles/hardened.nix b/nixos/modules/profiles/hardened.nix
index 97279a78a57b..29c3f2f8bbf8 100644
--- a/nixos/modules/profiles/hardened.nix
+++ b/nixos/modules/profiles/hardened.nix
@@ -26,7 +26,7 @@ with lib;
 
   security.allowSimultaneousMultithreading = mkDefault false;
 
-  security.virtualization.flushL1DataCache = mkDefault "always";
+  security.virtualisation.flushL1DataCache = mkDefault "always";
 
   security.apparmor.enable = mkDefault true;
 
diff --git a/nixos/modules/rename.nix b/nixos/modules/rename.nix
index f611a3992ed4..4ae642222740 100644
--- a/nixos/modules/rename.nix
+++ b/nixos/modules/rename.nix
@@ -63,6 +63,8 @@ with lib;
     (mkRemovedOptionModule [ "security" "setuidOwners" ] "Use security.wrappers instead")
     (mkRemovedOptionModule [ "security" "setuidPrograms" ] "Use security.wrappers instead")
 
+    (mkRenamedOptionModule [ "security" "virtualization" "flushL1DataCache" ] [ "security" "virtualisation" "flushL1DataCache" ])
+
     # PAM
     (mkRenamedOptionModule [ "security" "pam" "enableU2F" ] [ "security" "pam" "u2f" "enable" ])
 
diff --git a/nixos/modules/security/misc.nix b/nixos/modules/security/misc.nix
index bf474ac0a546..2a7f07ef6dbe 100644
--- a/nixos/modules/security/misc.nix
+++ b/nixos/modules/security/misc.nix
@@ -48,13 +48,13 @@ with lib;
         e.g., shared caches).  This attack vector is unproven.
 
         Disabling SMT is a supplement to the L1 data cache flushing mitigation
-        (see <xref linkend="opt-security.virtualization.flushL1DataCache"/>)
+        (see <xref linkend="opt-security.virtualisation.flushL1DataCache"/>)
         versus malicious VM guests (SMT could "bring back" previously flushed
         data).
       '';
     };
 
-    security.virtualization.flushL1DataCache = mkOption {
+    security.virtualisation.flushL1DataCache = mkOption {
       type = types.nullOr (types.enum [ "never" "cond" "always" ]);
       default = null;
       description = ''
@@ -114,8 +114,8 @@ with lib;
       boot.kernelParams = [ "nosmt" ];
     })
 
-    (mkIf (config.security.virtualization.flushL1DataCache != null) {
-      boot.kernelParams = [ "kvm-intel.vmentry_l1d_flush=${config.security.virtualization.flushL1DataCache}" ];
+    (mkIf (config.security.virtualisation.flushL1DataCache != null) {
+      boot.kernelParams = [ "kvm-intel.vmentry_l1d_flush=${config.security.virtualisation.flushL1DataCache}" ];
     })
   ];
 }