diff --git a/objectifier-module.nix b/objectifier-module.nix
index 6d63f7d..372f1f6 100644
--- a/objectifier-module.nix
+++ b/objectifier-module.nix
@@ -47,7 +47,7 @@ in {
         OBJECTIFIER_YOLOV3_CONFIG = "${pkgs.yolov3-data}/yolov3.cfg";
         OBJECTIFIER_YOLOV3_WEIGHTS = "${pkgs.yolov3-data}/yolov3.weights";
         OBJECTIFIER_YOLOV3_LABELS = "${pkgs.yolov3-data}/labels";
-        OBJECTIFIER_BUFFER_SIZE = 524288;
+        OBJECTIFIER_BUFFER_SIZE = "524288";
       };
       serviceConfig = {
         # PrivateUsers = true;