diff --git a/nixos/modules/services/matrix/matrix-sliding-sync.nix b/nixos/modules/services/matrix/matrix-sliding-sync.nix
index 078fe211c8d5..d62e41bebd64 100644
--- a/nixos/modules/services/matrix/matrix-sliding-sync.nix
+++ b/nixos/modules/services/matrix/matrix-sliding-sync.nix
@@ -98,6 +98,7 @@ in
         ExecStart = lib.getExe cfg.package;
         StateDirectory = "matrix-sliding-sync";
         WorkingDirectory = "%S/matrix-sliding-sync";
+        RuntimeDirectory = "matrix-sliding-sync";
         Restart = "on-failure";
         RestartSec = "1s";
       };