diff --git a/example/cpp/td_example.cpp b/example/cpp/td_example.cpp
index 36e3ca3ab..f53dcc8a8 100644
--- a/example/cpp/td_example.cpp
+++ b/example/cpp/td_example.cpp
@@ -273,6 +273,7 @@ class TdExample {
             },
             [this](td_api::authorizationStateWaitTdlibParameters &) {
               auto parameters = td_api::make_object<td_api::tdlibParameters>();
+              parameters->database_directory_ = "tdlib";
               parameters->use_message_database_ = true;
               parameters->use_secret_chats_ = true;
               parameters->api_id_ = 94575;
diff --git a/example/java/org/drinkless/tdlib/example/Example.java b/example/java/org/drinkless/tdlib/example/Example.java
index bf5b30f9d..db374aaa4 100644
--- a/example/java/org/drinkless/tdlib/example/Example.java
+++ b/example/java/org/drinkless/tdlib/example/Example.java
@@ -83,6 +83,7 @@ public final class Example {
         switch (Example.authorizationState.getConstructor()) {
             case TdApi.AuthorizationStateWaitTdlibParameters.CONSTRUCTOR:
                 TdApi.TdlibParameters parameters = new TdApi.TdlibParameters();
+                parameters.databaseDirectory = "tdlib";
                 parameters.useMessageDatabase = true;
                 parameters.useSecretChats = true;
                 parameters.apiId = 94575;
@@ -265,7 +266,7 @@ public final class Example {
     public static void main(String[] args) throws InterruptedException {
         // disable TDLib log
         Log.setVerbosityLevel(0);
-        if (!Log.setFilePath("log")) {
+        if (!Log.setFilePath("tdlib.log")) {
             throw new IOError(new IOException("Write access to the current directory is required"));
         }
 
diff --git a/example/swift/src/main.swift b/example/swift/src/main.swift
index 1826459dc..84ca2b963 100644
--- a/example/swift/src/main.swift
+++ b/example/swift/src/main.swift
@@ -103,6 +103,7 @@ func updateAuthorizationState(authState: Dictionary<String, Any>) {
             client.queryAsync(query:[
                 "@type":"setTdlibParameters",
                 "parameters":[
+                    "database_directory":"tdlib",
                     "use_message_database":true,
                     "use_secret_chats":true,
                     "api_id":94575,