diff --git a/modules/postgresql.nix b/modules/postgresql.nix
index 5f3cfd8..6790dca 100644
--- a/modules/postgresql.nix
+++ b/modules/postgresql.nix
@@ -12,6 +12,16 @@
     #    };
     #  }
     #];
+    ensureUsers = [
+      {
+        name = "zbx_monitor";
+        ensurePermissions = {
+          "FUNCTION pg_catalog.pg_ls_dir(text)" = "EXECUTE";
+          "FUNCTION pg_catalog.pg_stat_file(text)" = "EXECUTE";
+          "FUNCTION pg_catalog.pg_ls_waldir()" = "EXECUTE";
+        };
+      }
+    ];
   };
 
   services.postgresqlBackup = {