diff --git a/nixos/modules/misc/ids.nix b/nixos/modules/misc/ids.nix
index 17ea04cb4ecb..a434932497d9 100644
--- a/nixos/modules/misc/ids.nix
+++ b/nixos/modules/misc/ids.nix
@@ -510,6 +510,7 @@ in
       #seeks = 148; # removed 2020-06-21
       prosody = 149;
       i2pd = 150;
+      systemd-coredump = 151;
       systemd-network = 152;
       systemd-resolve = 153;
       systemd-timesync = 154;
diff --git a/nixos/modules/system/boot/systemd/coredump.nix b/nixos/modules/system/boot/systemd/coredump.nix
index 03ef00e5683c..2dbc95e38ee3 100644
--- a/nixos/modules/system/boot/systemd/coredump.nix
+++ b/nixos/modules/system/boot/systemd/coredump.nix
@@ -66,7 +66,9 @@ in {
         uid = config.ids.uids.systemd-coredump;
         group = "systemd-coredump";
       };
-      users.groups.systemd-coredump = {};
+      users.groups.systemd-coredump = {
+        gid = config.ids.gids.systemd-coredump;
+      };
     })
 
     (mkIf (!cfg.enable) {