diff --git a/nixos/modules/system/boot/systemd.nix b/nixos/modules/system/boot/systemd.nix
index cdc9d2379392..7f207e6c7ef4 100644
--- a/nixos/modules/system/boot/systemd.nix
+++ b/nixos/modules/system/boot/systemd.nix
@@ -842,7 +842,6 @@ in
         [Manager]
         ${optionalString config.systemd.enableCgroupAccounting ''
           DefaultCPUAccounting=yes
-          DefaultBlockIOAccounting=yes
           DefaultIOAccounting=yes
           DefaultBlockIOAccounting=yes
           DefaultIPAccounting=yes