diff --git a/lib/server/commands/Propfind.js b/lib/server/commands/Propfind.js
index ebf2521c..3fb6997f 100644
--- a/lib/server/commands/Propfind.js
+++ b/lib/server/commands/Propfind.js
@@ -123,7 +123,8 @@ function default_1(arg, callback) {
                                         activelock.ele('D:lockscope').ele('D:' + lock.lockKind.scope.value.toLowerCase());
                                         activelock.ele('D:locktype').ele('D:' + lock.lockKind.type.value.toLowerCase());
                                         activelock.ele('D:depth').add('Infinity');
-                                        activelock.ele('D:owner').add(lock.owner);
+                                        if (lock.owner)
+                                            activelock.ele('D:owner').add(lock.owner);
                                         activelock.ele('D:timeout').add('Second-' + (lock.expirationDate - Date.now()));
                                         activelock.ele('D:locktoken').ele('D:href').add(lock.uuid);
                                         activelock.ele('D:lockroot').ele('D:href').add(arg.fullUri(path_1).replace(' ', '%20'));
diff --git a/src/server/commands/Propfind.ts b/src/server/commands/Propfind.ts
index f1e70c17..884db364 100644
--- a/src/server/commands/Propfind.ts
+++ b/src/server/commands/Propfind.ts
@@ -161,7 +161,8 @@ export default function(arg : MethodCallArgs, callback)
                                         activelock.ele('D:lockscope').ele('D:' + lock.lockKind.scope.value.toLowerCase())
                                         activelock.ele('D:locktype').ele('D:' + lock.lockKind.type.value.toLowerCase())
                                         activelock.ele('D:depth').add('Infinity')
-                                        activelock.ele('D:owner').add(lock.owner)
+                                        if(lock.owner)
+                                            activelock.ele('D:owner').add(lock.owner)
                                         activelock.ele('D:timeout').add('Second-' + (lock.expirationDate - Date.now()))
                                         activelock.ele('D:locktoken').ele('D:href').add(lock.uuid)
                                         activelock.ele('D:lockroot').ele('D:href').add(arg.fullUri(path).replace(' ', '%20'))