diff --git a/nixos/modules/misc/ids.nix b/nixos/modules/misc/ids.nix
index 5f56e060227..e760a18f508 100644
--- a/nixos/modules/misc/ids.nix
+++ b/nixos/modules/misc/ids.nix
@@ -210,7 +210,7 @@ in
       #fleet = 173; # unused
       #input = 174; # unused
       sddm = 175;
-      tss = 176;
+      #tss = 176; # dynamically allocated as of 2021-09-17
       #memcached = 177; removed 2018-01-03
       #ntp = 179; # dynamically allocated as of 2021-09-17
       zabbix = 180;
@@ -524,7 +524,7 @@ in
       #fleet = 173; # unused
       input = 174;
       sddm = 175;
-      tss = 176;
+      #tss = 176; #dynamically allocateda as of 2021-09-20
       #memcached = 177; # unused, removed 2018-01-03
       #ntp = 179; # unused
       zabbix = 180;
diff --git a/nixos/modules/security/tpm2.nix b/nixos/modules/security/tpm2.nix
index 27f9b58c975..d37425166f8 100644
--- a/nixos/modules/security/tpm2.nix
+++ b/nixos/modules/security/tpm2.nix
@@ -146,6 +146,7 @@ in {
       # Create the tss user and group only if the default value is used
       users.users.${cfg.tssUser} = lib.mkIf (cfg.tssUser == "tss") {
         isSystemUser = true;
+        group = "tss";
       };
       users.groups.${cfg.tssGroup} = lib.mkIf (cfg.tssGroup == "tss") {};
 
@@ -172,7 +173,7 @@ in {
           BusName = "com.intel.tss2.Tabrmd";
           ExecStart = "${cfg.abrmd.package}/bin/tpm2-abrmd";
           User = "tss";
-          Group = "nogroup";
+          Group = "tss";
         };
       };
 
diff --git a/nixos/modules/services/hardware/tcsd.nix b/nixos/modules/services/hardware/tcsd.nix
index 0d36bce357b..c549a677501 100644
--- a/nixos/modules/services/hardware/tcsd.nix
+++ b/nixos/modules/services/hardware/tcsd.nix
@@ -149,12 +149,10 @@ in
     users.users = optionalAttrs (cfg.user == "tss") {
       tss = {
         group = "tss";
-        uid = config.ids.uids.tss;
+        isSystemUser = true;
       };
     };
 
-    users.groups = optionalAttrs (cfg.group == "tss") {
-      tss.gid = config.ids.gids.tss;
-    };
+    users.groups = optionalAttrs (cfg.group == "tss") { tss = {}; };
   };
 }